Added export_allowed file to make repository visible in cgit

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diff --git a/node_modules/dir-compare/LICENSE b/node_modules/dir-compare/LICENSE
new file mode 100644
index 0000000..50df0a3
--- /dev/null
+++ b/node_modules/dir-compare/LICENSE
@@ -0,0 +1,22 @@
+Copyright 2014 Liviu Grigorescu (grigoresculiviu@gmail.com)
+
+This project is free software released under the MIT license:
+http://www.opensource.org/licenses/mit-license.php 
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
\ No newline at end of file
diff --git a/node_modules/dir-compare/README.md b/node_modules/dir-compare/README.md
new file mode 100644
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--- /dev/null
+++ b/node_modules/dir-compare/README.md
@@ -0,0 +1,374 @@
+dir-compare
+==========
+Node JS directory compare
+
+[![Build Status](https://api.travis-ci.org/gliviu/dir-compare.svg?branch=master)](https://travis-ci.org/gliviu/dir-compare)
+[![Build status](https://ci.appveyor.com/api/projects/status/fpnqkr2gfg7pwkxk/branch/master?svg=true)](https://ci.appveyor.com/project/gliviu/dir-compare)
+[![codecov.io](http://codecov.io/github/gliviu/dir-compare/coverage.svg?branch=master)](http://codecov.io/github/gliviu/dir-compare?branch=master)
+
+- [Installation](#installation)
+- [Library](#library)
+  * [Use](#use)
+  * [Api](#api)
+  * [Glob patterns](#glob-patterns)
+  * [Custom file content comparators](#custom-file-content-comparators)
+    + [Ignore line endings and white spaces](#ignore-line-endings-and-white-spaces)
+  * [Custom name comparators](#custom-name-comparators)
+  * [Custom result builder](#custom-result-builder)
+  * [Symbolic links](#symbolic-links)
+- [Command line](#command-line)
+- [Changelog](#changelog)
+
+# Installation
+```shell
+$ npm install dir-compare
+```
+or
+```shell
+$ npm install -g dir-compare
+```
+for command line utility.
+
+# Library
+
+## Use
+```javascript
+const dircompare = require('dir-compare');
+
+const options = { compareSize: true };
+// Multiple compare strategy can be used simultaneously - compareSize, compareContent, compareDate, compareSymlink.
+// If one comparison fails for a pair of files, they are considered distinct.
+const path1 = '...';
+const path2 = '...';
+
+// Synchronous
+const res = dircompare.compareSync(path1, path2, options)
+print(res)
+
+// Asynchronous
+dircompare.compare(path1, path2, options)
+  .then(res => print(res))
+  .catch(error => console.error(error));
+
+
+function print(result) {
+  console.log('Directories are %s', result.same ? 'identical' : 'different')
+
+  console.log('Statistics - equal entries: %s, distinct entries: %s, left only entries: %s, right only entries: %s, differences: %s',
+    result.equal, result.distinct, result.left, result.right, result.differences)
+
+  result.diffSet.forEach(dif => console.log('Difference - name1: %s, type1: %s, name2: %s, type2: %s, state: %s',
+    dif.name1, dif.type1, dif.name2, dif.type2, dif.state))
+}
+```
+
+Typescript
+```typescript
+import { compare, compareSync, Options, Result } from "dir-compare";
+const path1 = '...';
+const path2 = '...';
+const options: Options = { compareSize: true };
+
+const res: Result = compareSync(path1, path2, options);
+console.log(res)
+
+compare(path1, path2, options)
+  .then(res => console.log(res))
+  .catch(error => console.error(error));
+```
+
+## Api
+
+
+Below is a quick recap of the api. For more details check the [reference documentation](https://gliviu.github.io/dc-api/).
+```typescript
+compare(path1: string, path2: string, options?: Options): Promise<Result>
+compareSync(path1: string, path2: string, options?: Options): Result
+```
+
+```Options```
+* **compareSize**: true/false - Compares files by size. Defaults to 'false'.
+* **compareContent**: true/false - Compares files by content. Defaults to 'false'.
+* **compareFileSync**, **compareFileAsync**: Callbacks for file comparison. See [Custom file content comparators](#custom-file-content-comparators).
+* **compareDate**: true/false - Compares files by date of modification (stat.mtime). Defaults to 'false'.
+* **compareNameHandler**: Callback for name comparison. See [Custom name comparators](#custom-name-comparators).
+* **dateTolerance**: milliseconds - Two files are considered to have the same date if the difference between their modification dates fits within date tolerance. Defaults to 1000 ms.
+* **compareSymlink**: true/false - Compares entries by symlink. Defaults to 'false'.
+* **skipSymlinks**: true/false - Ignore symbolic links. Defaults to 'false'.
+* **skipSubdirs**: true/false - Skips sub directories. Defaults to 'false'.
+* **ignoreCase**: true/false - Ignores case when comparing names. Defaults to 'false'.
+* **noDiffSet**: true/false - Toggles presence of diffSet in output. If true, only statistics are provided. Use this when comparing large number of files to avoid out of memory situations. Defaults to 'false'.
+* **includeFilter**: File name filter. Comma separated [minimatch](https://www.npmjs.com/package/minimatch) patterns. See [Glob patterns](#glob-patterns) below.
+* **excludeFilter**: File/directory name exclude filter. Comma separated [minimatch](https://www.npmjs.com/package/minimatch) patterns.  See [Glob patterns](#glob-patterns) below.
+* **resultBuilder**: Callback for constructing result. Called for each compared entry pair. Updates `statistics` and `diffSet`. More details in [Custom result builder](#custom-result-builder).
+
+```Result```
+* **same**: true if directories are identical
+* **distinct**: number of distinct entries
+* **equal**: number of equal entries
+* **left**: number of entries only in path1
+* **right**: number of entries only in path2
+* **differences**: total number of differences (distinct+left+right)
+* **total**: total number of entries (differences+equal)
+* **distinctFiles**: number of distinct files
+* **equalFiles**: number of equal files
+* **leftFiles**: number of files only in path1
+* **rightFiles**: number of files only in path2
+* **differencesFiles**: total number of different files (distinctFiles+leftFiles+rightFiles)
+* **totalFiles**: total number of files (differencesFiles+equalFiles)
+* **distinctDirs**: number of distinct directories
+* **equalDirs**: number of equal directories
+* **leftDirs**: number of directories only in path1
+* **rightDirs**: number of directories only in path2
+* **differencesDirs**: total number of different directories (distinctDirs+leftDirs+rightDirs)
+* **totalDirs**: total number of directories (differencesDirs+equalDirs)
+* **brokenLinks**:
+    * **leftBrokenLinks**: number of broken links only in path1
+    * **rightBrokenLinks**: number of broken links only in path2
+    * **distinctBrokenLinks**: number of broken links with same name appearing in both path1 and path2
+    * **totalBrokenLinks**: total number of broken links (leftBrokenLinks+rightBrokenLinks+distinctBrokenLinks)
+* **symlinks**: Statistics available if `compareSymlink` options is used
+    * **distinctSymlinks**: number of distinct links
+    * **equalSymlinks**: number of equal links
+    * **leftSymlinks**: number of links only in path1
+    * **rightSymlinks**: number of links only in path2
+    * **differencesSymlinks**: total number of different links (distinctSymlinks+leftSymlinks+rightSymlinks)
+    * **totalSymlinks**: total number of links (differencesSymlinks+equalSymlinks)
+* **diffSet** - List of changes (present if `options.noDiffSet` is false)
+    * **path1**: path not including file/directory name; can be relative or absolute depending on call to compare(),
+    * **path2**: path not including file/directory name; can be relative or absolute depending on call to compare(),
+    * **relativePath**: path relative to root,
+    * **name1**: file/directory name
+    * **name2**: file/directory name
+    * **state**: one of equal, left, right, distinct,
+    * **type1**: one of missing, file, directory, broken-link
+    * **type2**: one of missing, file, directory, broken-link
+    * **size1**: file size
+    * **size2**: file size
+    * **date1**: modification date (stat.mtime)
+    * **date2**: modification date (stat.mtime)
+    * **level**: depth
+    * **reason**: Provides reason when two identically named entries are distinct.  
+      Not available if entries are equal.  
+      One of "different-size", "different-date", "different-content", "broken-link", "different-symlink".
+
+##  Glob patterns
+[Minimatch](https://www.npmjs.com/package/minimatch) patterns are used to include/exclude files to be compared.
+
+The pattern is matched against the relative path of the entry being compared.
+
+Following examples assume we are comparing two [dir-compare](https://github.com/gliviu/dir-compare) code bases.
+
+
+```
+dircompare -x ".git,node_modules" dir1 dir2')    exclude git and node modules directories
+dircompare -x "expected" dir1 dir2')             exclude '/tests/expected' directory
+dircompare -x "/tests/expected" dir1 dir2')      exclude '/tests/expected' directory
+dircompare -x "**/expected" dir1 dir2')          exclude '/tests/expected' directory
+dircompare -x "**/tests/**/*.js" dir1 dir2')     exclude all js files in '/tests' directory and subdirectories
+dircompare -f "*.js,*.yml" dir1 dir2')           include js and yaml files
+dircompare -f "/tests/**/*.js" dir1 dir2')       include all js files in '/tests' directory and subdirectories
+dircompare -f "**/tests/**/*.ts" dir1 dir2')     include all js files in '/tests' directory and subdirectories
+```
+
+## Custom file content comparators
+By default file content is binary compared. As of version 1.5.0 custom file comparison handlers may be specified.
+
+Custom handlers are specified by `compareFileSync` and `compareFileAsync` options which correspond to `dircompare.compareSync()` or `dircompare.compare()` methods.
+
+A couple of handlers are included in the library:
+* binary sync compare - `dircompare.fileCompareHandlers.defaultFileCompare.compareSync`
+* binary async compare - `dircompare.fileCompareHandlers.defaultFileCompare.compareAsync`
+* text sync compare - `dircompare.fileCompareHandlers.lineBasedFileCompare.compareSync`
+* text async compare - `dircompare.fileCompareHandlers.lineBasedFileCompare.compareAsync`
+
+Use [defaultFileCompare.js](https://github.com/gliviu/dir-compare/blob/master/src/fileCompareHandler/defaultFileCompare.js) as an example to create your own.
+
+### Ignore line endings and white spaces
+Line based comparator can be used to ignore line ending and white space differences. This comparator is not available in [CLI](#command-line) mode.
+```javascript
+var dircompare = require('dir-compare');
+
+var options = {
+  compareContent: true,
+  compareFileSync: dircompare.fileCompareHandlers.lineBasedFileCompare.compareSync,
+  compareFileAsync: dircompare.fileCompareHandlers.lineBasedFileCompare.compareAsync,
+  ignoreLineEnding: true,
+  ignoreWhiteSpaces: true
+};
+
+var path1 = '...';
+var path2 = '...';
+var res = dircompare.compareSync(path1, path2, options);
+console.log(res)
+
+dircompare.compare(path1, path2, options)
+.then(res => console.log(res))
+```
+## Custom name comparators
+If [default](https://github.com/gliviu/dir-compare/blob/master/src/nameCompare/defaultNameCompare.js) name comparison is not enough, custom behavior can be specified with [compareNameHandler](https://gliviu.github.io/dc-api/index.html#comparenamehandler) option.
+Following example adds the possibility to ignore file extensions.
+```typescript
+import { Options, compare } from 'dir-compare'
+import path from 'path'
+
+var options: Options = {
+    compareSize: false,                    // compare only name by disabling size and content criteria
+    compareContent: false,
+    compareNameHandler: customNameCompare, // new name comparator used to ignore extensions
+    ignoreExtension: true,                 // supported by the custom name compare below
+};
+
+function customNameCompare(name1: string, name2: string, options: Options) {
+    if (options.ignoreCase) {
+        name1 = name1.toLowerCase()
+        name2 = name2.toLowerCase()
+    }
+    if (options.ignoreExtension) {
+        name1 = path.basename(name1, path.extname(name1))
+        name2 = path.basename(name2, path.extname(name2))
+    }
+    return ((name1 === name2) ? 0 : ((name1 > name2) ? 1 : -1))
+}
+
+var path1 = '/tmp/a';
+var path2 = '/tmp/b';
+
+var res = compare(path1, path2, options).then(res => {
+    console.log(`Same: ${res.same}`)
+    if (!res.diffSet) {
+        return
+    }
+    res.diffSet.forEach(dif => console.log(`${dif.name1} ${dif.name2} ${dif.state}`))
+})
+
+// Outputs
+// icon.svg icon.png equal
+// logo.svg logo.jpg equal
+```
+
+## Custom result builder
+[Result builder](https://gliviu.github.io/dc-api/index.html#resultbuilder) is called for each pair of entries encountered during comparison. Its purpose is to append entries in `diffSet` and eventually update `statistics` object with new stats.
+
+If needed it can be replaced with custom implementation.
+
+```javascript
+var dircompare = require("dircompare")
+
+var customResultBuilder = function (entry1, entry2, state, level, relativePath, options, statistics, diffSet, reason) {
+    ...
+}
+
+var options = {
+    compareSize: true,
+    resultBuilder: customResultBuilder
+}
+var res = dircompare.compareSync('...', '...', options)
+
+```
+
+The [default](https://github.com/gliviu/dir-compare/blob/master/src/resultBuilder/defaultResultBuilderCallback.js) builder can be used as an example.
+
+## Symbolic links
+Unless `compareSymlink` option is used, symbolic links are resolved and any comparison is applied to the file/directory they point to.
+
+Circular loops are handled by breaking the loop as soon as it is detected.
+
+Version `1.x` treats broken links as `ENOENT: no such file or directory`.  
+Since `2.0` they are treated as a special type of entry - `broken-link` - and are available as stats (`totalBrokenLinks`, `distinctBrokenLinks`, ...).
+
+Using `compareSymlink` option causes `dircompare` to check symlink values for equality.
+In this mode two entries with identical name are considered different if
+* one is symlink, the other is not
+* both are symlinks but point to different locations
+
+These rules are applied in addition to the other comparison modes; ie. by content, by size...
+
+If entries are different because of symlinks, `reason` will be `different-symlink`. Also statistics summarizes differences caused by symbolik links.
+
+# Command line
+```
+  Usage: dircompare [options] leftdir rightdir
+
+  Options:
+
+    -h, --help               output usage information
+    -V, --version            output the version number
+    -c, --compare-content    compare files by content
+    -D, --compare-date       compare files by date
+    --date-tolerance [type]  tolerance to be used in date comparison (milliseconds)
+    --compare-symlink        compare files and directories by symlink
+    -f, --filter [type]      file name filter
+    -x, --exclude [type]     file/directory name exclude filter
+    -S, --skip-subdirs       do not recurse into subdirectories
+    -L, --skip-symlinks      ignore symlinks
+    -i, --ignore-case        ignores case when comparing file names
+    -l, --show-left          report - show entries occurring in left dir
+    -r, --show-right         report - show entries occurring in right dir
+    -e, --show-equal         report - show identic entries occurring in both dirs
+    -d, --show-distinct      report - show distinct entries occurring in both dirs
+    -a, --show-all           report - show all entries
+    -w, --whole-report       report - include directories in detailed report
+    --reason                 report - show reason when entries are distinct
+    --csv                    report - print details as csv
+    --nocolors               don't use console colors
+    --async                  Make use of multiple cores
+
+  By default files are compared by size.
+  --date-tolerance defaults to 1000 ms. Two files are considered to have
+  the same date if the difference between their modification dates fits
+  within date tolerance.
+
+  Exit codes:
+    0 - entries are identical
+    1 - entries are different
+    2 - error occurred
+
+  Examples:
+  compare by content         dircompare -c dir1 dir2
+  show only different files  dircompare -d dir1 dir2
+
+  exclude filter             dircompare -x ".git,node_modules" dir1 dir2
+                             dircompare -x "/tests/expected" dir1 dir2
+                             dircompare -x "**/expected" dir1 dir2
+                             dircompare -x "**/tests/**/*.ts" dir1 dir2
+  
+  include filter             dircompare -f "*.js,*.yml" dir1 dir2
+                             dircompare -f "/tests/**/*.js" dir1 dir2
+                             dircompare -f "**/tests/**/*.ts" dir1 dir2
+```
+
+# Changelog
+* v2.4.0 New option to customize file/folder name comparison
+* v2.3.0 Fixes
+* v2.1.0 Removed [bluebird](https://github.com/petkaantonov/bluebird/#note) dependency
+* v2.0.0
+  * New option to compare symlinks.
+  * New field indicating reason for two entries being distinct.
+  * Improved command line output format.
+  * Tests are no longer part of published package.
+  * Generated [Api](#api) documentation.
+  
+  Breaking changes:
+  * Broken links are no longer treated as errors. As a result there are new statistics (leftBrokenLinks, rightBrokenLinks, distinctBrokenLinks, totalBrokenLinks) and new entry type - broken-link.
+    Details in [Symbolic links](#symbolic-links).
+  * Typescript correction: new interface `Result` replaced `Statistics`.
+* v1.8.0 
+    * globstar patterns
+    * typescript corrections
+    * removed support for node 0.11, 0.12, iojs
+* v1.7.0 performance improvements
+* v1.6.0 typescript support
+* v1.5.0 added option to ignore line endings and white space differences
+* v1.3.0 added date tolerance option
+* v1.2.0 added compare by date option
+* v1.1.0
+    * detect symlink loops
+    * improved color scheme for command line utility
+* v1.0.0
+    * asynchronous processing
+    * new library options: noDiffSet, resultBuilder
+    * new statistics: distinctFiles, equalFiles, leftFiles, rightFiles, distinctDirs, equalDirs, leftDirs, rightDirs
+    * new --async command line option
+    * Fix for https://github.com/tj/commander.js/issues/125
+* v0.0.3 Fix fille ordering issue for newer node versions
diff --git a/node_modules/dir-compare/node_modules/commander/History.md b/node_modules/dir-compare/node_modules/commander/History.md
new file mode 100644
index 0000000..1b47439
--- /dev/null
+++ b/node_modules/dir-compare/node_modules/commander/History.md
@@ -0,0 +1,261 @@
+
+2.9.0 / 2015-10-13
+==================
+
+  * Add option `isDefault` to set default subcommand #415 @Qix-
+  * Add callback to allow filtering or post-processing of help text #434 @djulien
+  * Fix `undefined` text in help information close #414 #416 @zhiyelee
+
+2.8.1 / 2015-04-22
+==================
+
+ * Back out `support multiline description` Close #396 #397
+
+2.8.0 / 2015-04-07
+==================
+
+  * Add `process.execArg` support, execution args like `--harmony` will be passed to sub-commands #387 @DigitalIO @zhiyelee
+  * Fix bug in Git-style sub-commands #372 @zhiyelee
+  * Allow commands to be hidden from help #383 @tonylukasavage
+  * When git-style sub-commands are in use, yet none are called, display help #382 @claylo
+  * Add ability to specify arguments syntax for top-level command #258 @rrthomas
+  * Support multiline descriptions #208 @zxqfox
+
+2.7.1 / 2015-03-11
+==================
+
+ * Revert #347 (fix collisions when option and first arg have same name) which causes a bug in #367.
+
+2.7.0 / 2015-03-09
+==================
+
+ * Fix git-style bug when installed globally. Close #335 #349 @zhiyelee
+ * Fix collisions when option and first arg have same name. Close #346 #347 @tonylukasavage
+ * Add support for camelCase on `opts()`. Close #353  @nkzawa
+ * Add node.js 0.12 and io.js to travis.yml
+ * Allow RegEx options. #337 @palanik
+ * Fixes exit code when sub-command failing.  Close #260 #332 @pirelenito
+ * git-style `bin` files in $PATH make sense. Close #196 #327  @zhiyelee
+
+2.6.0 / 2014-12-30
+==================
+
+  * added `Command#allowUnknownOption` method. Close #138 #318 @doozr @zhiyelee
+  * Add application description to the help msg. Close #112 @dalssoft
+
+2.5.1 / 2014-12-15
+==================
+
+  * fixed two bugs incurred by variadic arguments. Close #291 @Quentin01 #302 @zhiyelee
+
+2.5.0 / 2014-10-24
+==================
+
+ * add support for variadic arguments. Closes #277 @whitlockjc
+
+2.4.0 / 2014-10-17
+==================
+
+ * fixed a bug on executing the coercion function of subcommands option. Closes #270
+ * added `Command.prototype.name` to retrieve command name. Closes #264 #266 @tonylukasavage
+ * added `Command.prototype.opts` to retrieve all the options as a simple object of key-value pairs. Closes #262 @tonylukasavage
+ * fixed a bug on subcommand name. Closes #248 @jonathandelgado
+ * fixed function normalize doesn’t honor option terminator. Closes #216 @abbr
+
+2.3.0 / 2014-07-16
+==================
+
+ * add command alias'. Closes PR #210
+ * fix: Typos. Closes #99
+ * fix: Unused fs module. Closes #217
+
+2.2.0 / 2014-03-29
+==================
+
+ * add passing of previous option value
+ * fix: support subcommands on windows. Closes #142
+ * Now the defaultValue passed as the second argument of the coercion function.
+
+2.1.0 / 2013-11-21
+==================
+
+ * add: allow cflag style option params, unit test, fixes #174
+
+2.0.0 / 2013-07-18
+==================
+
+ * remove input methods (.prompt, .confirm, etc)
+
+1.3.2 / 2013-07-18
+==================
+
+ * add support for sub-commands to co-exist with the original command
+
+1.3.1 / 2013-07-18
+==================
+
+ * add quick .runningCommand hack so you can opt-out of other logic when running a sub command
+
+1.3.0 / 2013-07-09
+==================
+
+ * add EACCES error handling
+ * fix sub-command --help
+
+1.2.0 / 2013-06-13
+==================
+
+ * allow "-" hyphen as an option argument
+ * support for RegExp coercion
+
+1.1.1 / 2012-11-20
+==================
+
+  * add more sub-command padding
+  * fix .usage() when args are present. Closes #106
+
+1.1.0 / 2012-11-16
+==================
+
+  * add git-style executable subcommand support. Closes #94
+
+1.0.5 / 2012-10-09
+==================
+
+  * fix `--name` clobbering. Closes #92
+  * fix examples/help. Closes #89
+
+1.0.4 / 2012-09-03
+==================
+
+  * add `outputHelp()` method.
+
+1.0.3 / 2012-08-30
+==================
+
+  * remove invalid .version() defaulting
+
+1.0.2 / 2012-08-24
+==================
+
+  * add `--foo=bar` support [arv]
+  * fix password on node 0.8.8. Make backward compatible with 0.6 [focusaurus]
+
+1.0.1 / 2012-08-03
+==================
+
+  * fix issue #56
+  * fix tty.setRawMode(mode) was moved to tty.ReadStream#setRawMode() (i.e. process.stdin.setRawMode())
+
+1.0.0 / 2012-07-05
+==================
+
+  * add support for optional option descriptions
+  * add defaulting of `.version()` to package.json's version
+
+0.6.1 / 2012-06-01
+==================
+
+  * Added: append (yes or no) on confirmation
+  * Added: allow node.js v0.7.x
+
+0.6.0 / 2012-04-10
+==================
+
+  * Added `.prompt(obj, callback)` support. Closes #49
+  * Added default support to .choose(). Closes #41
+  * Fixed the choice example
+
+0.5.1 / 2011-12-20
+==================
+
+  * Fixed `password()` for recent nodes. Closes #36
+
+0.5.0 / 2011-12-04
+==================
+
+  * Added sub-command option support [itay]
+
+0.4.3 / 2011-12-04
+==================
+
+  * Fixed custom help ordering. Closes #32
+
+0.4.2 / 2011-11-24
+==================
+
+  * Added travis support
+  * Fixed: line-buffered input automatically trimmed. Closes #31
+
+0.4.1 / 2011-11-18
+==================
+
+  * Removed listening for "close" on --help
+
+0.4.0 / 2011-11-15
+==================
+
+  * Added support for `--`. Closes #24
+
+0.3.3 / 2011-11-14
+==================
+
+  * Fixed: wait for close event when writing help info [Jerry Hamlet]
+
+0.3.2 / 2011-11-01
+==================
+
+  * Fixed long flag definitions with values [felixge]
+
+0.3.1 / 2011-10-31
+==================
+
+  * Changed `--version` short flag to `-V` from `-v`
+  * Changed `.version()` so it's configurable [felixge]
+
+0.3.0 / 2011-10-31
+==================
+
+  * Added support for long flags only. Closes #18
+
+0.2.1 / 2011-10-24
+==================
+
+  * "node": ">= 0.4.x < 0.7.0". Closes #20
+
+0.2.0 / 2011-09-26
+==================
+
+  * Allow for defaults that are not just boolean. Default peassignment only occurs for --no-*, optional, and required arguments. [Jim Isaacs]
+
+0.1.0 / 2011-08-24
+==================
+
+  * Added support for custom `--help` output
+
+0.0.5 / 2011-08-18
+==================
+
+  * Changed: when the user enters nothing prompt for password again
+  * Fixed issue with passwords beginning with numbers [NuckChorris]
+
+0.0.4 / 2011-08-15
+==================
+
+  * Fixed `Commander#args`
+
+0.0.3 / 2011-08-15
+==================
+
+  * Added default option value support
+
+0.0.2 / 2011-08-15
+==================
+
+  * Added mask support to `Command#password(str[, mask], fn)`
+  * Added `Command#password(str, fn)`
+
+0.0.1 / 2010-01-03
+==================
+
+  * Initial release
diff --git a/node_modules/dir-compare/node_modules/commander/LICENSE b/node_modules/dir-compare/node_modules/commander/LICENSE
new file mode 100644
index 0000000..10f997a
--- /dev/null
+++ b/node_modules/dir-compare/node_modules/commander/LICENSE
@@ -0,0 +1,22 @@
+(The MIT License)
+
+Copyright (c) 2011 TJ Holowaychuk <tj@vision-media.ca>
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+'Software'), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/node_modules/dir-compare/node_modules/commander/Readme.md b/node_modules/dir-compare/node_modules/commander/Readme.md
new file mode 100644
index 0000000..08b9e4c
--- /dev/null
+++ b/node_modules/dir-compare/node_modules/commander/Readme.md
@@ -0,0 +1,351 @@
+# Commander.js
+
+
+[![Build Status](https://api.travis-ci.org/tj/commander.js.svg)](http://travis-ci.org/tj/commander.js)
+[![NPM Version](http://img.shields.io/npm/v/commander.svg?style=flat)](https://www.npmjs.org/package/commander)
+[![NPM Downloads](https://img.shields.io/npm/dm/commander.svg?style=flat)](https://www.npmjs.org/package/commander)
+[![Join the chat at https://gitter.im/tj/commander.js](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/tj/commander.js?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
+
+  The complete solution for [node.js](http://nodejs.org) command-line interfaces, inspired by Ruby's [commander](https://github.com/tj/commander).  
+  [API documentation](http://tj.github.com/commander.js/)
+
+
+## Installation
+
+    $ npm install commander
+
+## Option parsing
+
+ Options with commander are defined with the `.option()` method, also serving as documentation for the options. The example below parses args and options from `process.argv`, leaving remaining args as the `program.args` array which were not consumed by options.
+
+```js
+#!/usr/bin/env node
+
+/**
+ * Module dependencies.
+ */
+
+var program = require('commander');
+
+program
+  .version('0.0.1')
+  .option('-p, --peppers', 'Add peppers')
+  .option('-P, --pineapple', 'Add pineapple')
+  .option('-b, --bbq-sauce', 'Add bbq sauce')
+  .option('-c, --cheese [type]', 'Add the specified type of cheese [marble]', 'marble')
+  .parse(process.argv);
+
+console.log('you ordered a pizza with:');
+if (program.peppers) console.log('  - peppers');
+if (program.pineapple) console.log('  - pineapple');
+if (program.bbqSauce) console.log('  - bbq');
+console.log('  - %s cheese', program.cheese);
+```
+
+ Short flags may be passed as a single arg, for example `-abc` is equivalent to `-a -b -c`. Multi-word options such as "--template-engine" are camel-cased, becoming `program.templateEngine` etc.
+
+
+## Coercion
+
+```js
+function range(val) {
+  return val.split('..').map(Number);
+}
+
+function list(val) {
+  return val.split(',');
+}
+
+function collect(val, memo) {
+  memo.push(val);
+  return memo;
+}
+
+function increaseVerbosity(v, total) {
+  return total + 1;
+}
+
+program
+  .version('0.0.1')
+  .usage('[options] <file ...>')
+  .option('-i, --integer <n>', 'An integer argument', parseInt)
+  .option('-f, --float <n>', 'A float argument', parseFloat)
+  .option('-r, --range <a>..<b>', 'A range', range)
+  .option('-l, --list <items>', 'A list', list)
+  .option('-o, --optional [value]', 'An optional value')
+  .option('-c, --collect [value]', 'A repeatable value', collect, [])
+  .option('-v, --verbose', 'A value that can be increased', increaseVerbosity, 0)
+  .parse(process.argv);
+
+console.log(' int: %j', program.integer);
+console.log(' float: %j', program.float);
+console.log(' optional: %j', program.optional);
+program.range = program.range || [];
+console.log(' range: %j..%j', program.range[0], program.range[1]);
+console.log(' list: %j', program.list);
+console.log(' collect: %j', program.collect);
+console.log(' verbosity: %j', program.verbose);
+console.log(' args: %j', program.args);
+```
+
+## Regular Expression
+```js
+program
+  .version('0.0.1')
+  .option('-s --size <size>', 'Pizza size', /^(large|medium|small)$/i, 'medium')
+  .option('-d --drink [drink]', 'Drink', /^(coke|pepsi|izze)$/i)
+  .parse(process.argv);
+  
+console.log(' size: %j', program.size);
+console.log(' drink: %j', program.drink);
+```
+
+## Variadic arguments
+
+ The last argument of a command can be variadic, and only the last argument.  To make an argument variadic you have to
+ append `...` to the argument name.  Here is an example:
+
+```js
+#!/usr/bin/env node
+
+/**
+ * Module dependencies.
+ */
+
+var program = require('commander');
+
+program
+  .version('0.0.1')
+  .command('rmdir <dir> [otherDirs...]')
+  .action(function (dir, otherDirs) {
+    console.log('rmdir %s', dir);
+    if (otherDirs) {
+      otherDirs.forEach(function (oDir) {
+        console.log('rmdir %s', oDir);
+      });
+    }
+  });
+
+program.parse(process.argv);
+```
+
+ An `Array` is used for the value of a variadic argument.  This applies to `program.args` as well as the argument passed
+ to your action as demonstrated above.
+
+## Specify the argument syntax
+
+```js
+#!/usr/bin/env node
+
+var program = require('../');
+
+program
+  .version('0.0.1')
+  .arguments('<cmd> [env]')
+  .action(function (cmd, env) {
+     cmdValue = cmd;
+     envValue = env;
+  });
+
+program.parse(process.argv);
+
+if (typeof cmdValue === 'undefined') {
+   console.error('no command given!');
+   process.exit(1);
+}
+console.log('command:', cmdValue);
+console.log('environment:', envValue || "no environment given");
+```
+
+## Git-style sub-commands
+
+```js
+// file: ./examples/pm
+var program = require('..');
+
+program
+  .version('0.0.1')
+  .command('install [name]', 'install one or more packages')
+  .command('search [query]', 'search with optional query')
+  .command('list', 'list packages installed', {isDefault: true})
+  .parse(process.argv);
+```
+
+When `.command()` is invoked with a description argument, no `.action(callback)` should be called to handle sub-commands, otherwise there will be an error. This tells commander that you're going to use separate executables for sub-commands, much like `git(1)` and other popular tools.  
+The commander will try to search the executables in the directory of the entry script (like `./examples/pm`) with the name `program-command`, like `pm-install`, `pm-search`.
+
+Options can be passed with the call to `.command()`. Specifying `true` for `opts.noHelp` will remove the option from the generated help output. Specifying `true` for `opts.isDefault` will run the subcommand if no other subcommand is specified.
+
+If the program is designed to be installed globally, make sure the executables have proper modes, like `755`.
+
+### `--harmony`
+
+You can enable `--harmony` option in two ways:
+* Use `#! /usr/bin/env node --harmony` in the sub-commands scripts. Note some os version don’t support this pattern.
+* Use the `--harmony` option when call the command, like `node --harmony examples/pm publish`. The `--harmony` option will be preserved when spawning sub-command process.
+
+## Automated --help
+
+ The help information is auto-generated based on the information commander already knows about your program, so the following `--help` info is for free:
+
+```  
+ $ ./examples/pizza --help
+
+   Usage: pizza [options]
+
+   An application for pizzas ordering
+
+   Options:
+
+     -h, --help           output usage information
+     -V, --version        output the version number
+     -p, --peppers        Add peppers
+     -P, --pineapple      Add pineapple
+     -b, --bbq            Add bbq sauce
+     -c, --cheese <type>  Add the specified type of cheese [marble]
+     -C, --no-cheese      You do not want any cheese
+
+```
+
+## Custom help
+
+ You can display arbitrary `-h, --help` information
+ by listening for "--help". Commander will automatically
+ exit once you are done so that the remainder of your program
+ does not execute causing undesired behaviours, for example
+ in the following executable "stuff" will not output when
+ `--help` is used.
+
+```js
+#!/usr/bin/env node
+
+/**
+ * Module dependencies.
+ */
+
+var program = require('commander');
+
+program
+  .version('0.0.1')
+  .option('-f, --foo', 'enable some foo')
+  .option('-b, --bar', 'enable some bar')
+  .option('-B, --baz', 'enable some baz');
+
+// must be before .parse() since
+// node's emit() is immediate
+
+program.on('--help', function(){
+  console.log('  Examples:');
+  console.log('');
+  console.log('    $ custom-help --help');
+  console.log('    $ custom-help -h');
+  console.log('');
+});
+
+program.parse(process.argv);
+
+console.log('stuff');
+```
+
+Yields the following help output when `node script-name.js -h` or `node script-name.js --help` are run:
+
+```
+
+Usage: custom-help [options]
+
+Options:
+
+  -h, --help     output usage information
+  -V, --version  output the version number
+  -f, --foo      enable some foo
+  -b, --bar      enable some bar
+  -B, --baz      enable some baz
+
+Examples:
+
+  $ custom-help --help
+  $ custom-help -h
+
+```
+
+## .outputHelp(cb)
+
+Output help information without exiting.
+Optional callback cb allows post-processing of help text before it is displayed.
+
+If you want to display help by default (e.g. if no command was provided), you can use something like:
+
+```js
+var program = require('commander');
+var colors = require('colors');
+
+program
+  .version('0.0.1')
+  .command('getstream [url]', 'get stream URL')
+  .parse(process.argv);
+
+  if (!process.argv.slice(2).length) {
+    program.outputHelp(make_red);
+  }
+
+function make_red(txt) {
+  return colors.red(txt); //display the help text in red on the console
+}
+```
+
+## .help(cb)
+
+  Output help information and exit immediately.
+  Optional callback cb allows post-processing of help text before it is displayed.
+
+## Examples
+
+```js
+var program = require('commander');
+
+program
+  .version('0.0.1')
+  .option('-C, --chdir <path>', 'change the working directory')
+  .option('-c, --config <path>', 'set config path. defaults to ./deploy.conf')
+  .option('-T, --no-tests', 'ignore test hook')
+
+program
+  .command('setup [env]')
+  .description('run setup commands for all envs')
+  .option("-s, --setup_mode [mode]", "Which setup mode to use")
+  .action(function(env, options){
+    var mode = options.setup_mode || "normal";
+    env = env || 'all';
+    console.log('setup for %s env(s) with %s mode', env, mode);
+  });
+
+program
+  .command('exec <cmd>')
+  .alias('ex')
+  .description('execute the given remote cmd')
+  .option("-e, --exec_mode <mode>", "Which exec mode to use")
+  .action(function(cmd, options){
+    console.log('exec "%s" using %s mode', cmd, options.exec_mode);
+  }).on('--help', function() {
+    console.log('  Examples:');
+    console.log();
+    console.log('    $ deploy exec sequential');
+    console.log('    $ deploy exec async');
+    console.log();
+  });
+
+program
+  .command('*')
+  .action(function(env){
+    console.log('deploying "%s"', env);
+  });
+
+program.parse(process.argv);
+```
+
+More Demos can be found in the [examples](https://github.com/tj/commander.js/tree/master/examples) directory.
+
+## License
+
+MIT
+
diff --git a/node_modules/dir-compare/node_modules/commander/index.js b/node_modules/dir-compare/node_modules/commander/index.js
new file mode 100644
index 0000000..a19c05d
--- /dev/null
+++ b/node_modules/dir-compare/node_modules/commander/index.js
@@ -0,0 +1,1110 @@
+/**
+ * Module dependencies.
+ */
+
+var EventEmitter = require('events').EventEmitter;
+var spawn = require('child_process').spawn;
+var readlink = require('graceful-readlink').readlinkSync;
+var path = require('path');
+var dirname = path.dirname;
+var basename = path.basename;
+var fs = require('fs');
+
+/**
+ * Expose the root command.
+ */
+
+exports = module.exports = new Command();
+
+/**
+ * Expose `Command`.
+ */
+
+exports.Command = Command;
+
+/**
+ * Expose `Option`.
+ */
+
+exports.Option = Option;
+
+/**
+ * Initialize a new `Option` with the given `flags` and `description`.
+ *
+ * @param {String} flags
+ * @param {String} description
+ * @api public
+ */
+
+function Option(flags, description) {
+  this.flags = flags;
+  this.required = ~flags.indexOf('<');
+  this.optional = ~flags.indexOf('[');
+  this.bool = !~flags.indexOf('-no-');
+  flags = flags.split(/[ ,|]+/);
+  if (flags.length > 1 && !/^[[<]/.test(flags[1])) this.short = flags.shift();
+  this.long = flags.shift();
+  this.description = description || '';
+}
+
+/**
+ * Return option name.
+ *
+ * @return {String}
+ * @api private
+ */
+
+Option.prototype.name = function() {
+  return this.long
+    .replace('--', '')
+    .replace('no-', '');
+};
+
+/**
+ * Check if `arg` matches the short or long flag.
+ *
+ * @param {String} arg
+ * @return {Boolean}
+ * @api private
+ */
+
+Option.prototype.is = function(arg) {
+  return arg == this.short || arg == this.long;
+};
+
+/**
+ * Initialize a new `Command`.
+ *
+ * @param {String} name
+ * @api public
+ */
+
+function Command(name) {
+  this.commands = [];
+  this.options = [];
+  this._execs = {};
+  this._allowUnknownOption = false;
+  this._args = [];
+  this._name = name || '';
+}
+
+/**
+ * Inherit from `EventEmitter.prototype`.
+ */
+
+Command.prototype.__proto__ = EventEmitter.prototype;
+
+/**
+ * Add command `name`.
+ *
+ * The `.action()` callback is invoked when the
+ * command `name` is specified via __ARGV__,
+ * and the remaining arguments are applied to the
+ * function for access.
+ *
+ * When the `name` is "*" an un-matched command
+ * will be passed as the first arg, followed by
+ * the rest of __ARGV__ remaining.
+ *
+ * Examples:
+ *
+ *      program
+ *        .version('0.0.1')
+ *        .option('-C, --chdir <path>', 'change the working directory')
+ *        .option('-c, --config <path>', 'set config path. defaults to ./deploy.conf')
+ *        .option('-T, --no-tests', 'ignore test hook')
+ *
+ *      program
+ *        .command('setup')
+ *        .description('run remote setup commands')
+ *        .action(function() {
+ *          console.log('setup');
+ *        });
+ *
+ *      program
+ *        .command('exec <cmd>')
+ *        .description('run the given remote command')
+ *        .action(function(cmd) {
+ *          console.log('exec "%s"', cmd);
+ *        });
+ *
+ *      program
+ *        .command('teardown <dir> [otherDirs...]')
+ *        .description('run teardown commands')
+ *        .action(function(dir, otherDirs) {
+ *          console.log('dir "%s"', dir);
+ *          if (otherDirs) {
+ *            otherDirs.forEach(function (oDir) {
+ *              console.log('dir "%s"', oDir);
+ *            });
+ *          }
+ *        });
+ *
+ *      program
+ *        .command('*')
+ *        .description('deploy the given env')
+ *        .action(function(env) {
+ *          console.log('deploying "%s"', env);
+ *        });
+ *
+ *      program.parse(process.argv);
+  *
+ * @param {String} name
+ * @param {String} [desc] for git-style sub-commands
+ * @return {Command} the new command
+ * @api public
+ */
+
+Command.prototype.command = function(name, desc, opts) {
+  opts = opts || {};
+  var args = name.split(/ +/);
+  var cmd = new Command(args.shift());
+
+  if (desc) {
+    cmd.description(desc);
+    this.executables = true;
+    this._execs[cmd._name] = true;
+    if (opts.isDefault) this.defaultExecutable = cmd._name;
+  }
+
+  cmd._noHelp = !!opts.noHelp;
+  this.commands.push(cmd);
+  cmd.parseExpectedArgs(args);
+  cmd.parent = this;
+
+  if (desc) return this;
+  return cmd;
+};
+
+/**
+ * Define argument syntax for the top-level command.
+ *
+ * @api public
+ */
+
+Command.prototype.arguments = function (desc) {
+  return this.parseExpectedArgs(desc.split(/ +/));
+};
+
+/**
+ * Add an implicit `help [cmd]` subcommand
+ * which invokes `--help` for the given command.
+ *
+ * @api private
+ */
+
+Command.prototype.addImplicitHelpCommand = function() {
+  this.command('help [cmd]', 'display help for [cmd]');
+};
+
+/**
+ * Parse expected `args`.
+ *
+ * For example `["[type]"]` becomes `[{ required: false, name: 'type' }]`.
+ *
+ * @param {Array} args
+ * @return {Command} for chaining
+ * @api public
+ */
+
+Command.prototype.parseExpectedArgs = function(args) {
+  if (!args.length) return;
+  var self = this;
+  args.forEach(function(arg) {
+    var argDetails = {
+      required: false,
+      name: '',
+      variadic: false
+    };
+
+    switch (arg[0]) {
+      case '<':
+        argDetails.required = true;
+        argDetails.name = arg.slice(1, -1);
+        break;
+      case '[':
+        argDetails.name = arg.slice(1, -1);
+        break;
+    }
+
+    if (argDetails.name.length > 3 && argDetails.name.slice(-3) === '...') {
+      argDetails.variadic = true;
+      argDetails.name = argDetails.name.slice(0, -3);
+    }
+    if (argDetails.name) {
+      self._args.push(argDetails);
+    }
+  });
+  return this;
+};
+
+/**
+ * Register callback `fn` for the command.
+ *
+ * Examples:
+ *
+ *      program
+ *        .command('help')
+ *        .description('display verbose help')
+ *        .action(function() {
+ *           // output help here
+ *        });
+ *
+ * @param {Function} fn
+ * @return {Command} for chaining
+ * @api public
+ */
+
+Command.prototype.action = function(fn) {
+  var self = this;
+  var listener = function(args, unknown) {
+    // Parse any so-far unknown options
+    args = args || [];
+    unknown = unknown || [];
+
+    var parsed = self.parseOptions(unknown);
+
+    // Output help if necessary
+    outputHelpIfNecessary(self, parsed.unknown);
+
+    // If there are still any unknown options, then we simply
+    // die, unless someone asked for help, in which case we give it
+    // to them, and then we die.
+    if (parsed.unknown.length > 0) {
+      self.unknownOption(parsed.unknown[0]);
+    }
+
+    // Leftover arguments need to be pushed back. Fixes issue #56
+    if (parsed.args.length) args = parsed.args.concat(args);
+
+    self._args.forEach(function(arg, i) {
+      if (arg.required && null == args[i]) {
+        self.missingArgument(arg.name);
+      } else if (arg.variadic) {
+        if (i !== self._args.length - 1) {
+          self.variadicArgNotLast(arg.name);
+        }
+
+        args[i] = args.splice(i);
+      }
+    });
+
+    // Always append ourselves to the end of the arguments,
+    // to make sure we match the number of arguments the user
+    // expects
+    if (self._args.length) {
+      args[self._args.length] = self;
+    } else {
+      args.push(self);
+    }
+
+    fn.apply(self, args);
+  };
+  var parent = this.parent || this;
+  var name = parent === this ? '*' : this._name;
+  parent.on(name, listener);
+  if (this._alias) parent.on(this._alias, listener);
+  return this;
+};
+
+/**
+ * Define option with `flags`, `description` and optional
+ * coercion `fn`.
+ *
+ * The `flags` string should contain both the short and long flags,
+ * separated by comma, a pipe or space. The following are all valid
+ * all will output this way when `--help` is used.
+ *
+ *    "-p, --pepper"
+ *    "-p|--pepper"
+ *    "-p --pepper"
+ *
+ * Examples:
+ *
+ *     // simple boolean defaulting to false
+ *     program.option('-p, --pepper', 'add pepper');
+ *
+ *     --pepper
+ *     program.pepper
+ *     // => Boolean
+ *
+ *     // simple boolean defaulting to true
+ *     program.option('-C, --no-cheese', 'remove cheese');
+ *
+ *     program.cheese
+ *     // => true
+ *
+ *     --no-cheese
+ *     program.cheese
+ *     // => false
+ *
+ *     // required argument
+ *     program.option('-C, --chdir <path>', 'change the working directory');
+ *
+ *     --chdir /tmp
+ *     program.chdir
+ *     // => "/tmp"
+ *
+ *     // optional argument
+ *     program.option('-c, --cheese [type]', 'add cheese [marble]');
+ *
+ * @param {String} flags
+ * @param {String} description
+ * @param {Function|Mixed} fn or default
+ * @param {Mixed} defaultValue
+ * @return {Command} for chaining
+ * @api public
+ */
+
+Command.prototype.option = function(flags, description, fn, defaultValue) {
+  var self = this
+    , option = new Option(flags, description)
+    , oname = option.name()
+    , name = camelcase(oname);
+
+  // default as 3rd arg
+  if (typeof fn != 'function') {
+    if (fn instanceof RegExp) {
+      var regex = fn;
+      fn = function(val, def) {
+        var m = regex.exec(val);
+        return m ? m[0] : def;
+      }
+    }
+    else {
+      defaultValue = fn;
+      fn = null;
+    }
+  }
+
+  // preassign default value only for --no-*, [optional], or <required>
+  if (false == option.bool || option.optional || option.required) {
+    // when --no-* we make sure default is true
+    if (false == option.bool) defaultValue = true;
+    // preassign only if we have a default
+    if (undefined !== defaultValue) self[name] = defaultValue;
+  }
+
+  // register the option
+  this.options.push(option);
+
+  // when it's passed assign the value
+  // and conditionally invoke the callback
+  this.on(oname, function(val) {
+    // coercion
+    if (null !== val && fn) val = fn(val, undefined === self[name]
+      ? defaultValue
+      : self[name]);
+
+    // unassigned or bool
+    if ('boolean' == typeof self[name] || 'undefined' == typeof self[name]) {
+      // if no value, bool true, and we have a default, then use it!
+      if (null == val) {
+        self[name] = option.bool
+          ? defaultValue || true
+          : false;
+      } else {
+        self[name] = val;
+      }
+    } else if (null !== val) {
+      // reassign
+      self[name] = val;
+    }
+  });
+
+  return this;
+};
+
+/**
+ * Allow unknown options on the command line.
+ *
+ * @param {Boolean} arg if `true` or omitted, no error will be thrown
+ * for unknown options.
+ * @api public
+ */
+Command.prototype.allowUnknownOption = function(arg) {
+    this._allowUnknownOption = arguments.length === 0 || arg;
+    return this;
+};
+
+/**
+ * Parse `argv`, settings options and invoking commands when defined.
+ *
+ * @param {Array} argv
+ * @return {Command} for chaining
+ * @api public
+ */
+
+Command.prototype.parse = function(argv) {
+  // implicit help
+  if (this.executables) this.addImplicitHelpCommand();
+
+  // store raw args
+  this.rawArgs = argv;
+
+  // guess name
+  this._name = this._name || basename(argv[1], '.js');
+
+  // github-style sub-commands with no sub-command
+  if (this.executables && argv.length < 3 && !this.defaultExecutable) {
+    // this user needs help
+    argv.push('--help');
+  }
+
+  // process argv
+  var parsed = this.parseOptions(this.normalize(argv.slice(2)));
+  var args = this.args = parsed.args;
+
+  var result = this.parseArgs(this.args, parsed.unknown);
+
+  // executable sub-commands
+  var name = result.args[0];
+  if (this._execs[name] && typeof this._execs[name] != "function") {
+    return this.executeSubCommand(argv, args, parsed.unknown);
+  } else if (this.defaultExecutable) {
+    // use the default subcommand
+    args.unshift(name = this.defaultExecutable);
+    return this.executeSubCommand(argv, args, parsed.unknown);
+  }
+
+  return result;
+};
+
+/**
+ * Execute a sub-command executable.
+ *
+ * @param {Array} argv
+ * @param {Array} args
+ * @param {Array} unknown
+ * @api private
+ */
+
+Command.prototype.executeSubCommand = function(argv, args, unknown) {
+  args = args.concat(unknown);
+
+  if (!args.length) this.help();
+  if ('help' == args[0] && 1 == args.length) this.help();
+
+  // <cmd> --help
+  if ('help' == args[0]) {
+    args[0] = args[1];
+    args[1] = '--help';
+  }
+
+  // executable
+  var f = argv[1];
+  // name of the subcommand, link `pm-install`
+  var bin = basename(f, '.js') + '-' + args[0];
+
+
+  // In case of globally installed, get the base dir where executable
+  //  subcommand file should be located at
+  var baseDir
+    , link = readlink(f);
+
+  // when symbolink is relative path
+  if (link !== f && link.charAt(0) !== '/') {
+    link = path.join(dirname(f), link)
+  }
+  baseDir = dirname(link);
+
+  // prefer local `./<bin>` to bin in the $PATH
+  var localBin = path.join(baseDir, bin);
+
+  // whether bin file is a js script with explicit `.js` extension
+  var isExplicitJS = false;
+  if (exists(localBin + '.js')) {
+    bin = localBin + '.js';
+    isExplicitJS = true;
+  } else if (exists(localBin)) {
+    bin = localBin;
+  }
+
+  args = args.slice(1);
+
+  var proc;
+  if (process.platform !== 'win32') {
+    if (isExplicitJS) {
+      args.unshift(localBin);
+      // add executable arguments to spawn
+      args = (process.execArgv || []).concat(args);
+
+      proc = spawn('node', args, { stdio: 'inherit', customFds: [0, 1, 2] });
+    } else {
+      proc = spawn(bin, args, { stdio: 'inherit', customFds: [0, 1, 2] });
+    }
+  } else {
+    args.unshift(localBin);
+    proc = spawn(process.execPath, args, { stdio: 'inherit'});
+  }
+
+  proc.on('close', process.exit.bind(process));
+  proc.on('error', function(err) {
+    if (err.code == "ENOENT") {
+      console.error('\n  %s(1) does not exist, try --help\n', bin);
+    } else if (err.code == "EACCES") {
+      console.error('\n  %s(1) not executable. try chmod or run with root\n', bin);
+    }
+    process.exit(1);
+  });
+
+  // Store the reference to the child process
+  this.runningCommand = proc;
+};
+
+/**
+ * Normalize `args`, splitting joined short flags. For example
+ * the arg "-abc" is equivalent to "-a -b -c".
+ * This also normalizes equal sign and splits "--abc=def" into "--abc def".
+ *
+ * @param {Array} args
+ * @return {Array}
+ * @api private
+ */
+
+Command.prototype.normalize = function(args) {
+  var ret = []
+    , arg
+    , lastOpt
+    , index;
+
+  for (var i = 0, len = args.length; i < len; ++i) {
+    arg = args[i];
+    if (i > 0) {
+      lastOpt = this.optionFor(args[i-1]);
+    }
+
+    if (arg === '--') {
+      // Honor option terminator
+      ret = ret.concat(args.slice(i));
+      break;
+    } else if (lastOpt && lastOpt.required) {
+      ret.push(arg);
+    } else if (arg.length > 1 && '-' == arg[0] && '-' != arg[1]) {
+      arg.slice(1).split('').forEach(function(c) {
+        ret.push('-' + c);
+      });
+    } else if (/^--/.test(arg) && ~(index = arg.indexOf('='))) {
+      ret.push(arg.slice(0, index), arg.slice(index + 1));
+    } else {
+      ret.push(arg);
+    }
+  }
+
+  return ret;
+};
+
+/**
+ * Parse command `args`.
+ *
+ * When listener(s) are available those
+ * callbacks are invoked, otherwise the "*"
+ * event is emitted and those actions are invoked.
+ *
+ * @param {Array} args
+ * @return {Command} for chaining
+ * @api private
+ */
+
+Command.prototype.parseArgs = function(args, unknown) {
+  var name;
+
+  if (args.length) {
+    name = args[0];
+    if (this.listeners(name).length) {
+      this.emit(args.shift(), args, unknown);
+    } else {
+      this.emit('*', args);
+    }
+  } else {
+    outputHelpIfNecessary(this, unknown);
+
+    // If there were no args and we have unknown options,
+    // then they are extraneous and we need to error.
+    if (unknown.length > 0) {
+      this.unknownOption(unknown[0]);
+    }
+  }
+
+  return this;
+};
+
+/**
+ * Return an option matching `arg` if any.
+ *
+ * @param {String} arg
+ * @return {Option}
+ * @api private
+ */
+
+Command.prototype.optionFor = function(arg) {
+  for (var i = 0, len = this.options.length; i < len; ++i) {
+    if (this.options[i].is(arg)) {
+      return this.options[i];
+    }
+  }
+};
+
+/**
+ * Parse options from `argv` returning `argv`
+ * void of these options.
+ *
+ * @param {Array} argv
+ * @return {Array}
+ * @api public
+ */
+
+Command.prototype.parseOptions = function(argv) {
+  var args = []
+    , len = argv.length
+    , literal
+    , option
+    , arg;
+
+  var unknownOptions = [];
+
+  // parse options
+  for (var i = 0; i < len; ++i) {
+    arg = argv[i];
+
+    // literal args after --
+    if ('--' == arg) {
+      literal = true;
+      continue;
+    }
+
+    if (literal) {
+      args.push(arg);
+      continue;
+    }
+
+    // find matching Option
+    option = this.optionFor(arg);
+
+    // option is defined
+    if (option) {
+      // requires arg
+      if (option.required) {
+        arg = argv[++i];
+        if (null == arg) return this.optionMissingArgument(option);
+        this.emit(option.name(), arg);
+      // optional arg
+      } else if (option.optional) {
+        arg = argv[i+1];
+        if (null == arg || ('-' == arg[0] && '-' != arg)) {
+          arg = null;
+        } else {
+          ++i;
+        }
+        this.emit(option.name(), arg);
+      // bool
+      } else {
+        this.emit(option.name());
+      }
+      continue;
+    }
+
+    // looks like an option
+    if (arg.length > 1 && '-' == arg[0]) {
+      unknownOptions.push(arg);
+
+      // If the next argument looks like it might be
+      // an argument for this option, we pass it on.
+      // If it isn't, then it'll simply be ignored
+      if (argv[i+1] && '-' != argv[i+1][0]) {
+        unknownOptions.push(argv[++i]);
+      }
+      continue;
+    }
+
+    // arg
+    args.push(arg);
+  }
+
+  return { args: args, unknown: unknownOptions };
+};
+
+/**
+ * Return an object containing options as key-value pairs
+ *
+ * @return {Object}
+ * @api public
+ */
+Command.prototype.opts = function() {
+  var result = {}
+    , len = this.options.length;
+
+  for (var i = 0 ; i < len; i++) {
+    var key = camelcase(this.options[i].name());
+    result[key] = key === 'version' ? this._version : this[key];
+  }
+  return result;
+};
+
+/**
+ * Argument `name` is missing.
+ *
+ * @param {String} name
+ * @api private
+ */
+
+Command.prototype.missingArgument = function(name) {
+  console.error();
+  console.error("  error: missing required argument `%s'", name);
+  console.error();
+  process.exit(1);
+};
+
+/**
+ * `Option` is missing an argument, but received `flag` or nothing.
+ *
+ * @param {String} option
+ * @param {String} flag
+ * @api private
+ */
+
+Command.prototype.optionMissingArgument = function(option, flag) {
+  console.error();
+  if (flag) {
+    console.error("  error: option `%s' argument missing, got `%s'", option.flags, flag);
+  } else {
+    console.error("  error: option `%s' argument missing", option.flags);
+  }
+  console.error();
+  process.exit(1);
+};
+
+/**
+ * Unknown option `flag`.
+ *
+ * @param {String} flag
+ * @api private
+ */
+
+Command.prototype.unknownOption = function(flag) {
+  if (this._allowUnknownOption) return;
+  console.error();
+  console.error("  error: unknown option `%s'", flag);
+  console.error();
+  process.exit(1);
+};
+
+/**
+ * Variadic argument with `name` is not the last argument as required.
+ *
+ * @param {String} name
+ * @api private
+ */
+
+Command.prototype.variadicArgNotLast = function(name) {
+  console.error();
+  console.error("  error: variadic arguments must be last `%s'", name);
+  console.error();
+  process.exit(1);
+};
+
+/**
+ * Set the program version to `str`.
+ *
+ * This method auto-registers the "-V, --version" flag
+ * which will print the version number when passed.
+ *
+ * @param {String} str
+ * @param {String} flags
+ * @return {Command} for chaining
+ * @api public
+ */
+
+Command.prototype.version = function(str, flags) {
+  if (0 == arguments.length) return this._version;
+  this._version = str;
+  flags = flags || '-V, --version';
+  this.option(flags, 'output the version number');
+  this.on('version', function() {
+    process.stdout.write(str + '\n');
+    process.exit(0);
+  });
+  return this;
+};
+
+/**
+ * Set the description to `str`.
+ *
+ * @param {String} str
+ * @return {String|Command}
+ * @api public
+ */
+
+Command.prototype.description = function(str) {
+  if (0 === arguments.length) return this._description;
+  this._description = str;
+  return this;
+};
+
+/**
+ * Set an alias for the command
+ *
+ * @param {String} alias
+ * @return {String|Command}
+ * @api public
+ */
+
+Command.prototype.alias = function(alias) {
+  if (0 == arguments.length) return this._alias;
+  this._alias = alias;
+  return this;
+};
+
+/**
+ * Set / get the command usage `str`.
+ *
+ * @param {String} str
+ * @return {String|Command}
+ * @api public
+ */
+
+Command.prototype.usage = function(str) {
+  var args = this._args.map(function(arg) {
+    return humanReadableArgName(arg);
+  });
+
+  var usage = '[options]'
+    + (this.commands.length ? ' [command]' : '')
+    + (this._args.length ? ' ' + args.join(' ') : '');
+
+  if (0 == arguments.length) return this._usage || usage;
+  this._usage = str;
+
+  return this;
+};
+
+/**
+ * Get the name of the command
+ *
+ * @param {String} name
+ * @return {String|Command}
+ * @api public
+ */
+
+Command.prototype.name = function() {
+  return this._name;
+};
+
+/**
+ * Return the largest option length.
+ *
+ * @return {Number}
+ * @api private
+ */
+
+Command.prototype.largestOptionLength = function() {
+  return this.options.reduce(function(max, option) {
+    return Math.max(max, option.flags.length);
+  }, 0);
+};
+
+/**
+ * Return help for options.
+ *
+ * @return {String}
+ * @api private
+ */
+
+Command.prototype.optionHelp = function() {
+  var width = this.largestOptionLength();
+
+  // Prepend the help information
+  return [pad('-h, --help', width) + '  ' + 'output usage information']
+      .concat(this.options.map(function(option) {
+        return pad(option.flags, width) + '  ' + option.description;
+      }))
+      .join('\n');
+};
+
+/**
+ * Return command help documentation.
+ *
+ * @return {String}
+ * @api private
+ */
+
+Command.prototype.commandHelp = function() {
+  if (!this.commands.length) return '';
+
+  var commands = this.commands.filter(function(cmd) {
+    return !cmd._noHelp;
+  }).map(function(cmd) {
+    var args = cmd._args.map(function(arg) {
+      return humanReadableArgName(arg);
+    }).join(' ');
+
+    return [
+      cmd._name
+        + (cmd._alias ? '|' + cmd._alias : '')
+        + (cmd.options.length ? ' [options]' : '')
+        + ' ' + args
+      , cmd.description()
+    ];
+  });
+
+  var width = commands.reduce(function(max, command) {
+    return Math.max(max, command[0].length);
+  }, 0);
+
+  return [
+    ''
+    , '  Commands:'
+    , ''
+    , commands.map(function(cmd) {
+      var desc = cmd[1] ? '  ' + cmd[1] : '';
+      return pad(cmd[0], width) + desc;
+    }).join('\n').replace(/^/gm, '    ')
+    , ''
+  ].join('\n');
+};
+
+/**
+ * Return program help documentation.
+ *
+ * @return {String}
+ * @api private
+ */
+
+Command.prototype.helpInformation = function() {
+  var desc = [];
+  if (this._description) {
+    desc = [
+      '  ' + this._description
+      , ''
+    ];
+  }
+
+  var cmdName = this._name;
+  if (this._alias) {
+    cmdName = cmdName + '|' + this._alias;
+  }
+  var usage = [
+    ''
+    ,'  Usage: ' + cmdName + ' ' + this.usage()
+    , ''
+  ];
+
+  var cmds = [];
+  var commandHelp = this.commandHelp();
+  if (commandHelp) cmds = [commandHelp];
+
+  var options = [
+    '  Options:'
+    , ''
+    , '' + this.optionHelp().replace(/^/gm, '    ')
+    , ''
+    , ''
+  ];
+
+  return usage
+    .concat(cmds)
+    .concat(desc)
+    .concat(options)
+    .join('\n');
+};
+
+/**
+ * Output help information for this command
+ *
+ * @api public
+ */
+
+Command.prototype.outputHelp = function(cb) {
+  if (!cb) {
+    cb = function(passthru) {
+      return passthru;
+    }
+  }
+  process.stdout.write(cb(this.helpInformation()));
+  this.emit('--help');
+};
+
+/**
+ * Output help information and exit.
+ *
+ * @api public
+ */
+
+Command.prototype.help = function(cb) {
+  this.outputHelp(cb);
+  process.exit();
+};
+
+/**
+ * Camel-case the given `flag`
+ *
+ * @param {String} flag
+ * @return {String}
+ * @api private
+ */
+
+function camelcase(flag) {
+  return flag.split('-').reduce(function(str, word) {
+    return str + word[0].toUpperCase() + word.slice(1);
+  });
+}
+
+/**
+ * Pad `str` to `width`.
+ *
+ * @param {String} str
+ * @param {Number} width
+ * @return {String}
+ * @api private
+ */
+
+function pad(str, width) {
+  var len = Math.max(0, width - str.length);
+  return str + Array(len + 1).join(' ');
+}
+
+/**
+ * Output help information if necessary
+ *
+ * @param {Command} command to output help for
+ * @param {Array} array of options to search for -h or --help
+ * @api private
+ */
+
+function outputHelpIfNecessary(cmd, options) {
+  options = options || [];
+  for (var i = 0; i < options.length; i++) {
+    if (options[i] == '--help' || options[i] == '-h') {
+      cmd.outputHelp();
+      process.exit(0);
+    }
+  }
+}
+
+/**
+ * Takes an argument an returns its human readable equivalent for help usage.
+ *
+ * @param {Object} arg
+ * @return {String}
+ * @api private
+ */
+
+function humanReadableArgName(arg) {
+  var nameOutput = arg.name + (arg.variadic === true ? '...' : '');
+
+  return arg.required
+    ? '<' + nameOutput + '>'
+    : '[' + nameOutput + ']'
+}
+
+// for versions before node v0.8 when there weren't `fs.existsSync`
+function exists(file) {
+  try {
+    if (fs.statSync(file).isFile()) {
+      return true;
+    }
+  } catch (e) {
+    return false;
+  }
+}
+
diff --git a/node_modules/dir-compare/node_modules/commander/package.json b/node_modules/dir-compare/node_modules/commander/package.json
new file mode 100644
index 0000000..7731149
--- /dev/null
+++ b/node_modules/dir-compare/node_modules/commander/package.json
@@ -0,0 +1,33 @@
+{
+  "name": "commander",
+  "version": "2.9.0",
+  "description": "the complete solution for node.js command-line programs",
+  "keywords": [
+    "command",
+    "option",
+    "parser"
+  ],
+  "author": "TJ Holowaychuk <tj@vision-media.ca>",
+  "license": "MIT",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/tj/commander.js.git"
+  },
+  "devDependencies": {
+    "should": ">= 0.0.1",
+    "sinon": ">=1.17.1"
+  },
+  "scripts": {
+    "test": "make test"
+  },
+  "main": "index",
+  "engines": {
+    "node": ">= 0.6.x"
+  },
+  "files": [
+    "index.js"
+  ],
+  "dependencies": {
+    "graceful-readlink": ">= 1.0.0"
+  }
+}
diff --git a/node_modules/dir-compare/node_modules/minimatch/LICENSE b/node_modules/dir-compare/node_modules/minimatch/LICENSE
new file mode 100644
index 0000000..19129e3
--- /dev/null
+++ b/node_modules/dir-compare/node_modules/minimatch/LICENSE
@@ -0,0 +1,15 @@
+The ISC License
+
+Copyright (c) Isaac Z. Schlueter and Contributors
+
+Permission to use, copy, modify, and/or distribute this software for any
+purpose with or without fee is hereby granted, provided that the above
+copyright notice and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
+IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
diff --git a/node_modules/dir-compare/node_modules/minimatch/README.md b/node_modules/dir-compare/node_modules/minimatch/README.md
new file mode 100644
index 0000000..ad72b81
--- /dev/null
+++ b/node_modules/dir-compare/node_modules/minimatch/README.md
@@ -0,0 +1,209 @@
+# minimatch
+
+A minimal matching utility.
+
+[![Build Status](https://secure.travis-ci.org/isaacs/minimatch.svg)](http://travis-ci.org/isaacs/minimatch)
+
+
+This is the matching library used internally by npm.
+
+It works by converting glob expressions into JavaScript `RegExp`
+objects.
+
+## Usage
+
+```javascript
+var minimatch = require("minimatch")
+
+minimatch("bar.foo", "*.foo") // true!
+minimatch("bar.foo", "*.bar") // false!
+minimatch("bar.foo", "*.+(bar|foo)", { debug: true }) // true, and noisy!
+```
+
+## Features
+
+Supports these glob features:
+
+* Brace Expansion
+* Extended glob matching
+* "Globstar" `**` matching
+
+See:
+
+* `man sh`
+* `man bash`
+* `man 3 fnmatch`
+* `man 5 gitignore`
+
+## Minimatch Class
+
+Create a minimatch object by instantiating the `minimatch.Minimatch` class.
+
+```javascript
+var Minimatch = require("minimatch").Minimatch
+var mm = new Minimatch(pattern, options)
+```
+
+### Properties
+
+* `pattern` The original pattern the minimatch object represents.
+* `options` The options supplied to the constructor.
+* `set` A 2-dimensional array of regexp or string expressions.
+  Each row in the
+  array corresponds to a brace-expanded pattern.  Each item in the row
+  corresponds to a single path-part.  For example, the pattern
+  `{a,b/c}/d` would expand to a set of patterns like:
+
+        [ [ a, d ]
+        , [ b, c, d ] ]
+
+    If a portion of the pattern doesn't have any "magic" in it
+    (that is, it's something like `"foo"` rather than `fo*o?`), then it
+    will be left as a string rather than converted to a regular
+    expression.
+
+* `regexp` Created by the `makeRe` method.  A single regular expression
+  expressing the entire pattern.  This is useful in cases where you wish
+  to use the pattern somewhat like `fnmatch(3)` with `FNM_PATH` enabled.
+* `negate` True if the pattern is negated.
+* `comment` True if the pattern is a comment.
+* `empty` True if the pattern is `""`.
+
+### Methods
+
+* `makeRe` Generate the `regexp` member if necessary, and return it.
+  Will return `false` if the pattern is invalid.
+* `match(fname)` Return true if the filename matches the pattern, or
+  false otherwise.
+* `matchOne(fileArray, patternArray, partial)` Take a `/`-split
+  filename, and match it against a single row in the `regExpSet`.  This
+  method is mainly for internal use, but is exposed so that it can be
+  used by a glob-walker that needs to avoid excessive filesystem calls.
+
+All other methods are internal, and will be called as necessary.
+
+### minimatch(path, pattern, options)
+
+Main export.  Tests a path against the pattern using the options.
+
+```javascript
+var isJS = minimatch(file, "*.js", { matchBase: true })
+```
+
+### minimatch.filter(pattern, options)
+
+Returns a function that tests its
+supplied argument, suitable for use with `Array.filter`.  Example:
+
+```javascript
+var javascripts = fileList.filter(minimatch.filter("*.js", {matchBase: true}))
+```
+
+### minimatch.match(list, pattern, options)
+
+Match against the list of
+files, in the style of fnmatch or glob.  If nothing is matched, and
+options.nonull is set, then return a list containing the pattern itself.
+
+```javascript
+var javascripts = minimatch.match(fileList, "*.js", {matchBase: true}))
+```
+
+### minimatch.makeRe(pattern, options)
+
+Make a regular expression object from the pattern.
+
+## Options
+
+All options are `false` by default.
+
+### debug
+
+Dump a ton of stuff to stderr.
+
+### nobrace
+
+Do not expand `{a,b}` and `{1..3}` brace sets.
+
+### noglobstar
+
+Disable `**` matching against multiple folder names.
+
+### dot
+
+Allow patterns to match filenames starting with a period, even if
+the pattern does not explicitly have a period in that spot.
+
+Note that by default, `a/**/b` will **not** match `a/.d/b`, unless `dot`
+is set.
+
+### noext
+
+Disable "extglob" style patterns like `+(a|b)`.
+
+### nocase
+
+Perform a case-insensitive match.
+
+### nonull
+
+When a match is not found by `minimatch.match`, return a list containing
+the pattern itself if this option is set.  When not set, an empty list
+is returned if there are no matches.
+
+### matchBase
+
+If set, then patterns without slashes will be matched
+against the basename of the path if it contains slashes.  For example,
+`a?b` would match the path `/xyz/123/acb`, but not `/xyz/acb/123`.
+
+### nocomment
+
+Suppress the behavior of treating `#` at the start of a pattern as a
+comment.
+
+### nonegate
+
+Suppress the behavior of treating a leading `!` character as negation.
+
+### flipNegate
+
+Returns from negate expressions the same as if they were not negated.
+(Ie, true on a hit, false on a miss.)
+
+
+## Comparisons to other fnmatch/glob implementations
+
+While strict compliance with the existing standards is a worthwhile
+goal, some discrepancies exist between minimatch and other
+implementations, and are intentional.
+
+If the pattern starts with a `!` character, then it is negated.  Set the
+`nonegate` flag to suppress this behavior, and treat leading `!`
+characters normally.  This is perhaps relevant if you wish to start the
+pattern with a negative extglob pattern like `!(a|B)`.  Multiple `!`
+characters at the start of a pattern will negate the pattern multiple
+times.
+
+If a pattern starts with `#`, then it is treated as a comment, and
+will not match anything.  Use `\#` to match a literal `#` at the
+start of a line, or set the `nocomment` flag to suppress this behavior.
+
+The double-star character `**` is supported by default, unless the
+`noglobstar` flag is set.  This is supported in the manner of bsdglob
+and bash 4.1, where `**` only has special significance if it is the only
+thing in a path part.  That is, `a/**/b` will match `a/x/y/b`, but
+`a/**b` will not.
+
+If an escaped pattern has no matches, and the `nonull` flag is set,
+then minimatch.match returns the pattern as-provided, rather than
+interpreting the character escapes.  For example,
+`minimatch.match([], "\\*a\\?")` will return `"\\*a\\?"` rather than
+`"*a?"`.  This is akin to setting the `nullglob` option in bash, except
+that it does not resolve escaped pattern characters.
+
+If brace expansion is not disabled, then it is performed before any
+other interpretation of the glob pattern.  Thus, a pattern like
+`+(a|{b),c)}`, which would not be valid in bash or zsh, is expanded
+**first** into the set of `+(a|b)` and `+(a|c)`, and those patterns are
+checked for validity.  Since those two are valid, matching proceeds.
diff --git a/node_modules/dir-compare/node_modules/minimatch/minimatch.js b/node_modules/dir-compare/node_modules/minimatch/minimatch.js
new file mode 100644
index 0000000..5b5f8cf
--- /dev/null
+++ b/node_modules/dir-compare/node_modules/minimatch/minimatch.js
@@ -0,0 +1,923 @@
+module.exports = minimatch
+minimatch.Minimatch = Minimatch
+
+var path = { sep: '/' }
+try {
+  path = require('path')
+} catch (er) {}
+
+var GLOBSTAR = minimatch.GLOBSTAR = Minimatch.GLOBSTAR = {}
+var expand = require('brace-expansion')
+
+var plTypes = {
+  '!': { open: '(?:(?!(?:', close: '))[^/]*?)'},
+  '?': { open: '(?:', close: ')?' },
+  '+': { open: '(?:', close: ')+' },
+  '*': { open: '(?:', close: ')*' },
+  '@': { open: '(?:', close: ')' }
+}
+
+// any single thing other than /
+// don't need to escape / when using new RegExp()
+var qmark = '[^/]'
+
+// * => any number of characters
+var star = qmark + '*?'
+
+// ** when dots are allowed.  Anything goes, except .. and .
+// not (^ or / followed by one or two dots followed by $ or /),
+// followed by anything, any number of times.
+var twoStarDot = '(?:(?!(?:\\\/|^)(?:\\.{1,2})($|\\\/)).)*?'
+
+// not a ^ or / followed by a dot,
+// followed by anything, any number of times.
+var twoStarNoDot = '(?:(?!(?:\\\/|^)\\.).)*?'
+
+// characters that need to be escaped in RegExp.
+var reSpecials = charSet('().*{}+?[]^$\\!')
+
+// "abc" -> { a:true, b:true, c:true }
+function charSet (s) {
+  return s.split('').reduce(function (set, c) {
+    set[c] = true
+    return set
+  }, {})
+}
+
+// normalizes slashes.
+var slashSplit = /\/+/
+
+minimatch.filter = filter
+function filter (pattern, options) {
+  options = options || {}
+  return function (p, i, list) {
+    return minimatch(p, pattern, options)
+  }
+}
+
+function ext (a, b) {
+  a = a || {}
+  b = b || {}
+  var t = {}
+  Object.keys(b).forEach(function (k) {
+    t[k] = b[k]
+  })
+  Object.keys(a).forEach(function (k) {
+    t[k] = a[k]
+  })
+  return t
+}
+
+minimatch.defaults = function (def) {
+  if (!def || !Object.keys(def).length) return minimatch
+
+  var orig = minimatch
+
+  var m = function minimatch (p, pattern, options) {
+    return orig.minimatch(p, pattern, ext(def, options))
+  }
+
+  m.Minimatch = function Minimatch (pattern, options) {
+    return new orig.Minimatch(pattern, ext(def, options))
+  }
+
+  return m
+}
+
+Minimatch.defaults = function (def) {
+  if (!def || !Object.keys(def).length) return Minimatch
+  return minimatch.defaults(def).Minimatch
+}
+
+function minimatch (p, pattern, options) {
+  if (typeof pattern !== 'string') {
+    throw new TypeError('glob pattern string required')
+  }
+
+  if (!options) options = {}
+
+  // shortcut: comments match nothing.
+  if (!options.nocomment && pattern.charAt(0) === '#') {
+    return false
+  }
+
+  // "" only matches ""
+  if (pattern.trim() === '') return p === ''
+
+  return new Minimatch(pattern, options).match(p)
+}
+
+function Minimatch (pattern, options) {
+  if (!(this instanceof Minimatch)) {
+    return new Minimatch(pattern, options)
+  }
+
+  if (typeof pattern !== 'string') {
+    throw new TypeError('glob pattern string required')
+  }
+
+  if (!options) options = {}
+  pattern = pattern.trim()
+
+  // windows support: need to use /, not \
+  if (path.sep !== '/') {
+    pattern = pattern.split(path.sep).join('/')
+  }
+
+  this.options = options
+  this.set = []
+  this.pattern = pattern
+  this.regexp = null
+  this.negate = false
+  this.comment = false
+  this.empty = false
+
+  // make the set of regexps etc.
+  this.make()
+}
+
+Minimatch.prototype.debug = function () {}
+
+Minimatch.prototype.make = make
+function make () {
+  // don't do it more than once.
+  if (this._made) return
+
+  var pattern = this.pattern
+  var options = this.options
+
+  // empty patterns and comments match nothing.
+  if (!options.nocomment && pattern.charAt(0) === '#') {
+    this.comment = true
+    return
+  }
+  if (!pattern) {
+    this.empty = true
+    return
+  }
+
+  // step 1: figure out negation, etc.
+  this.parseNegate()
+
+  // step 2: expand braces
+  var set = this.globSet = this.braceExpand()
+
+  if (options.debug) this.debug = console.error
+
+  this.debug(this.pattern, set)
+
+  // step 3: now we have a set, so turn each one into a series of path-portion
+  // matching patterns.
+  // These will be regexps, except in the case of "**", which is
+  // set to the GLOBSTAR object for globstar behavior,
+  // and will not contain any / characters
+  set = this.globParts = set.map(function (s) {
+    return s.split(slashSplit)
+  })
+
+  this.debug(this.pattern, set)
+
+  // glob --> regexps
+  set = set.map(function (s, si, set) {
+    return s.map(this.parse, this)
+  }, this)
+
+  this.debug(this.pattern, set)
+
+  // filter out everything that didn't compile properly.
+  set = set.filter(function (s) {
+    return s.indexOf(false) === -1
+  })
+
+  this.debug(this.pattern, set)
+
+  this.set = set
+}
+
+Minimatch.prototype.parseNegate = parseNegate
+function parseNegate () {
+  var pattern = this.pattern
+  var negate = false
+  var options = this.options
+  var negateOffset = 0
+
+  if (options.nonegate) return
+
+  for (var i = 0, l = pattern.length
+    ; i < l && pattern.charAt(i) === '!'
+    ; i++) {
+    negate = !negate
+    negateOffset++
+  }
+
+  if (negateOffset) this.pattern = pattern.substr(negateOffset)
+  this.negate = negate
+}
+
+// Brace expansion:
+// a{b,c}d -> abd acd
+// a{b,}c -> abc ac
+// a{0..3}d -> a0d a1d a2d a3d
+// a{b,c{d,e}f}g -> abg acdfg acefg
+// a{b,c}d{e,f}g -> abdeg acdeg abdeg abdfg
+//
+// Invalid sets are not expanded.
+// a{2..}b -> a{2..}b
+// a{b}c -> a{b}c
+minimatch.braceExpand = function (pattern, options) {
+  return braceExpand(pattern, options)
+}
+
+Minimatch.prototype.braceExpand = braceExpand
+
+function braceExpand (pattern, options) {
+  if (!options) {
+    if (this instanceof Minimatch) {
+      options = this.options
+    } else {
+      options = {}
+    }
+  }
+
+  pattern = typeof pattern === 'undefined'
+    ? this.pattern : pattern
+
+  if (typeof pattern === 'undefined') {
+    throw new TypeError('undefined pattern')
+  }
+
+  if (options.nobrace ||
+    !pattern.match(/\{.*\}/)) {
+    // shortcut. no need to expand.
+    return [pattern]
+  }
+
+  return expand(pattern)
+}
+
+// parse a component of the expanded set.
+// At this point, no pattern may contain "/" in it
+// so we're going to return a 2d array, where each entry is the full
+// pattern, split on '/', and then turned into a regular expression.
+// A regexp is made at the end which joins each array with an
+// escaped /, and another full one which joins each regexp with |.
+//
+// Following the lead of Bash 4.1, note that "**" only has special meaning
+// when it is the *only* thing in a path portion.  Otherwise, any series
+// of * is equivalent to a single *.  Globstar behavior is enabled by
+// default, and can be disabled by setting options.noglobstar.
+Minimatch.prototype.parse = parse
+var SUBPARSE = {}
+function parse (pattern, isSub) {
+  if (pattern.length > 1024 * 64) {
+    throw new TypeError('pattern is too long')
+  }
+
+  var options = this.options
+
+  // shortcuts
+  if (!options.noglobstar && pattern === '**') return GLOBSTAR
+  if (pattern === '') return ''
+
+  var re = ''
+  var hasMagic = !!options.nocase
+  var escaping = false
+  // ? => one single character
+  var patternListStack = []
+  var negativeLists = []
+  var stateChar
+  var inClass = false
+  var reClassStart = -1
+  var classStart = -1
+  // . and .. never match anything that doesn't start with .,
+  // even when options.dot is set.
+  var patternStart = pattern.charAt(0) === '.' ? '' // anything
+  // not (start or / followed by . or .. followed by / or end)
+  : options.dot ? '(?!(?:^|\\\/)\\.{1,2}(?:$|\\\/))'
+  : '(?!\\.)'
+  var self = this
+
+  function clearStateChar () {
+    if (stateChar) {
+      // we had some state-tracking character
+      // that wasn't consumed by this pass.
+      switch (stateChar) {
+        case '*':
+          re += star
+          hasMagic = true
+        break
+        case '?':
+          re += qmark
+          hasMagic = true
+        break
+        default:
+          re += '\\' + stateChar
+        break
+      }
+      self.debug('clearStateChar %j %j', stateChar, re)
+      stateChar = false
+    }
+  }
+
+  for (var i = 0, len = pattern.length, c
+    ; (i < len) && (c = pattern.charAt(i))
+    ; i++) {
+    this.debug('%s\t%s %s %j', pattern, i, re, c)
+
+    // skip over any that are escaped.
+    if (escaping && reSpecials[c]) {
+      re += '\\' + c
+      escaping = false
+      continue
+    }
+
+    switch (c) {
+      case '/':
+        // completely not allowed, even escaped.
+        // Should already be path-split by now.
+        return false
+
+      case '\\':
+        clearStateChar()
+        escaping = true
+      continue
+
+      // the various stateChar values
+      // for the "extglob" stuff.
+      case '?':
+      case '*':
+      case '+':
+      case '@':
+      case '!':
+        this.debug('%s\t%s %s %j <-- stateChar', pattern, i, re, c)
+
+        // all of those are literals inside a class, except that
+        // the glob [!a] means [^a] in regexp
+        if (inClass) {
+          this.debug('  in class')
+          if (c === '!' && i === classStart + 1) c = '^'
+          re += c
+          continue
+        }
+
+        // if we already have a stateChar, then it means
+        // that there was something like ** or +? in there.
+        // Handle the stateChar, then proceed with this one.
+        self.debug('call clearStateChar %j', stateChar)
+        clearStateChar()
+        stateChar = c
+        // if extglob is disabled, then +(asdf|foo) isn't a thing.
+        // just clear the statechar *now*, rather than even diving into
+        // the patternList stuff.
+        if (options.noext) clearStateChar()
+      continue
+
+      case '(':
+        if (inClass) {
+          re += '('
+          continue
+        }
+
+        if (!stateChar) {
+          re += '\\('
+          continue
+        }
+
+        patternListStack.push({
+          type: stateChar,
+          start: i - 1,
+          reStart: re.length,
+          open: plTypes[stateChar].open,
+          close: plTypes[stateChar].close
+        })
+        // negation is (?:(?!js)[^/]*)
+        re += stateChar === '!' ? '(?:(?!(?:' : '(?:'
+        this.debug('plType %j %j', stateChar, re)
+        stateChar = false
+      continue
+
+      case ')':
+        if (inClass || !patternListStack.length) {
+          re += '\\)'
+          continue
+        }
+
+        clearStateChar()
+        hasMagic = true
+        var pl = patternListStack.pop()
+        // negation is (?:(?!js)[^/]*)
+        // The others are (?:<pattern>)<type>
+        re += pl.close
+        if (pl.type === '!') {
+          negativeLists.push(pl)
+        }
+        pl.reEnd = re.length
+      continue
+
+      case '|':
+        if (inClass || !patternListStack.length || escaping) {
+          re += '\\|'
+          escaping = false
+          continue
+        }
+
+        clearStateChar()
+        re += '|'
+      continue
+
+      // these are mostly the same in regexp and glob
+      case '[':
+        // swallow any state-tracking char before the [
+        clearStateChar()
+
+        if (inClass) {
+          re += '\\' + c
+          continue
+        }
+
+        inClass = true
+        classStart = i
+        reClassStart = re.length
+        re += c
+      continue
+
+      case ']':
+        //  a right bracket shall lose its special
+        //  meaning and represent itself in
+        //  a bracket expression if it occurs
+        //  first in the list.  -- POSIX.2 2.8.3.2
+        if (i === classStart + 1 || !inClass) {
+          re += '\\' + c
+          escaping = false
+          continue
+        }
+
+        // handle the case where we left a class open.
+        // "[z-a]" is valid, equivalent to "\[z-a\]"
+        if (inClass) {
+          // split where the last [ was, make sure we don't have
+          // an invalid re. if so, re-walk the contents of the
+          // would-be class to re-translate any characters that
+          // were passed through as-is
+          // TODO: It would probably be faster to determine this
+          // without a try/catch and a new RegExp, but it's tricky
+          // to do safely.  For now, this is safe and works.
+          var cs = pattern.substring(classStart + 1, i)
+          try {
+            RegExp('[' + cs + ']')
+          } catch (er) {
+            // not a valid class!
+            var sp = this.parse(cs, SUBPARSE)
+            re = re.substr(0, reClassStart) + '\\[' + sp[0] + '\\]'
+            hasMagic = hasMagic || sp[1]
+            inClass = false
+            continue
+          }
+        }
+
+        // finish up the class.
+        hasMagic = true
+        inClass = false
+        re += c
+      continue
+
+      default:
+        // swallow any state char that wasn't consumed
+        clearStateChar()
+
+        if (escaping) {
+          // no need
+          escaping = false
+        } else if (reSpecials[c]
+          && !(c === '^' && inClass)) {
+          re += '\\'
+        }
+
+        re += c
+
+    } // switch
+  } // for
+
+  // handle the case where we left a class open.
+  // "[abc" is valid, equivalent to "\[abc"
+  if (inClass) {
+    // split where the last [ was, and escape it
+    // this is a huge pita.  We now have to re-walk
+    // the contents of the would-be class to re-translate
+    // any characters that were passed through as-is
+    cs = pattern.substr(classStart + 1)
+    sp = this.parse(cs, SUBPARSE)
+    re = re.substr(0, reClassStart) + '\\[' + sp[0]
+    hasMagic = hasMagic || sp[1]
+  }
+
+  // handle the case where we had a +( thing at the *end*
+  // of the pattern.
+  // each pattern list stack adds 3 chars, and we need to go through
+  // and escape any | chars that were passed through as-is for the regexp.
+  // Go through and escape them, taking care not to double-escape any
+  // | chars that were already escaped.
+  for (pl = patternListStack.pop(); pl; pl = patternListStack.pop()) {
+    var tail = re.slice(pl.reStart + pl.open.length)
+    this.debug('setting tail', re, pl)
+    // maybe some even number of \, then maybe 1 \, followed by a |
+    tail = tail.replace(/((?:\\{2}){0,64})(\\?)\|/g, function (_, $1, $2) {
+      if (!$2) {
+        // the | isn't already escaped, so escape it.
+        $2 = '\\'
+      }
+
+      // need to escape all those slashes *again*, without escaping the
+      // one that we need for escaping the | character.  As it works out,
+      // escaping an even number of slashes can be done by simply repeating
+      // it exactly after itself.  That's why this trick works.
+      //
+      // I am sorry that you have to see this.
+      return $1 + $1 + $2 + '|'
+    })
+
+    this.debug('tail=%j\n   %s', tail, tail, pl, re)
+    var t = pl.type === '*' ? star
+      : pl.type === '?' ? qmark
+      : '\\' + pl.type
+
+    hasMagic = true
+    re = re.slice(0, pl.reStart) + t + '\\(' + tail
+  }
+
+  // handle trailing things that only matter at the very end.
+  clearStateChar()
+  if (escaping) {
+    // trailing \\
+    re += '\\\\'
+  }
+
+  // only need to apply the nodot start if the re starts with
+  // something that could conceivably capture a dot
+  var addPatternStart = false
+  switch (re.charAt(0)) {
+    case '.':
+    case '[':
+    case '(': addPatternStart = true
+  }
+
+  // Hack to work around lack of negative lookbehind in JS
+  // A pattern like: *.!(x).!(y|z) needs to ensure that a name
+  // like 'a.xyz.yz' doesn't match.  So, the first negative
+  // lookahead, has to look ALL the way ahead, to the end of
+  // the pattern.
+  for (var n = negativeLists.length - 1; n > -1; n--) {
+    var nl = negativeLists[n]
+
+    var nlBefore = re.slice(0, nl.reStart)
+    var nlFirst = re.slice(nl.reStart, nl.reEnd - 8)
+    var nlLast = re.slice(nl.reEnd - 8, nl.reEnd)
+    var nlAfter = re.slice(nl.reEnd)
+
+    nlLast += nlAfter
+
+    // Handle nested stuff like *(*.js|!(*.json)), where open parens
+    // mean that we should *not* include the ) in the bit that is considered
+    // "after" the negated section.
+    var openParensBefore = nlBefore.split('(').length - 1
+    var cleanAfter = nlAfter
+    for (i = 0; i < openParensBefore; i++) {
+      cleanAfter = cleanAfter.replace(/\)[+*?]?/, '')
+    }
+    nlAfter = cleanAfter
+
+    var dollar = ''
+    if (nlAfter === '' && isSub !== SUBPARSE) {
+      dollar = '$'
+    }
+    var newRe = nlBefore + nlFirst + nlAfter + dollar + nlLast
+    re = newRe
+  }
+
+  // if the re is not "" at this point, then we need to make sure
+  // it doesn't match against an empty path part.
+  // Otherwise a/* will match a/, which it should not.
+  if (re !== '' && hasMagic) {
+    re = '(?=.)' + re
+  }
+
+  if (addPatternStart) {
+    re = patternStart + re
+  }
+
+  // parsing just a piece of a larger pattern.
+  if (isSub === SUBPARSE) {
+    return [re, hasMagic]
+  }
+
+  // skip the regexp for non-magical patterns
+  // unescape anything in it, though, so that it'll be
+  // an exact match against a file etc.
+  if (!hasMagic) {
+    return globUnescape(pattern)
+  }
+
+  var flags = options.nocase ? 'i' : ''
+  try {
+    var regExp = new RegExp('^' + re + '$', flags)
+  } catch (er) {
+    // If it was an invalid regular expression, then it can't match
+    // anything.  This trick looks for a character after the end of
+    // the string, which is of course impossible, except in multi-line
+    // mode, but it's not a /m regex.
+    return new RegExp('$.')
+  }
+
+  regExp._glob = pattern
+  regExp._src = re
+
+  return regExp
+}
+
+minimatch.makeRe = function (pattern, options) {
+  return new Minimatch(pattern, options || {}).makeRe()
+}
+
+Minimatch.prototype.makeRe = makeRe
+function makeRe () {
+  if (this.regexp || this.regexp === false) return this.regexp
+
+  // at this point, this.set is a 2d array of partial
+  // pattern strings, or "**".
+  //
+  // It's better to use .match().  This function shouldn't
+  // be used, really, but it's pretty convenient sometimes,
+  // when you just want to work with a regex.
+  var set = this.set
+
+  if (!set.length) {
+    this.regexp = false
+    return this.regexp
+  }
+  var options = this.options
+
+  var twoStar = options.noglobstar ? star
+    : options.dot ? twoStarDot
+    : twoStarNoDot
+  var flags = options.nocase ? 'i' : ''
+
+  var re = set.map(function (pattern) {
+    return pattern.map(function (p) {
+      return (p === GLOBSTAR) ? twoStar
+      : (typeof p === 'string') ? regExpEscape(p)
+      : p._src
+    }).join('\\\/')
+  }).join('|')
+
+  // must match entire pattern
+  // ending in a * or ** will make it less strict.
+  re = '^(?:' + re + ')$'
+
+  // can match anything, as long as it's not this.
+  if (this.negate) re = '^(?!' + re + ').*$'
+
+  try {
+    this.regexp = new RegExp(re, flags)
+  } catch (ex) {
+    this.regexp = false
+  }
+  return this.regexp
+}
+
+minimatch.match = function (list, pattern, options) {
+  options = options || {}
+  var mm = new Minimatch(pattern, options)
+  list = list.filter(function (f) {
+    return mm.match(f)
+  })
+  if (mm.options.nonull && !list.length) {
+    list.push(pattern)
+  }
+  return list
+}
+
+Minimatch.prototype.match = match
+function match (f, partial) {
+  this.debug('match', f, this.pattern)
+  // short-circuit in the case of busted things.
+  // comments, etc.
+  if (this.comment) return false
+  if (this.empty) return f === ''
+
+  if (f === '/' && partial) return true
+
+  var options = this.options
+
+  // windows: need to use /, not \
+  if (path.sep !== '/') {
+    f = f.split(path.sep).join('/')
+  }
+
+  // treat the test path as a set of pathparts.
+  f = f.split(slashSplit)
+  this.debug(this.pattern, 'split', f)
+
+  // just ONE of the pattern sets in this.set needs to match
+  // in order for it to be valid.  If negating, then just one
+  // match means that we have failed.
+  // Either way, return on the first hit.
+
+  var set = this.set
+  this.debug(this.pattern, 'set', set)
+
+  // Find the basename of the path by looking for the last non-empty segment
+  var filename
+  var i
+  for (i = f.length - 1; i >= 0; i--) {
+    filename = f[i]
+    if (filename) break
+  }
+
+  for (i = 0; i < set.length; i++) {
+    var pattern = set[i]
+    var file = f
+    if (options.matchBase && pattern.length === 1) {
+      file = [filename]
+    }
+    var hit = this.matchOne(file, pattern, partial)
+    if (hit) {
+      if (options.flipNegate) return true
+      return !this.negate
+    }
+  }
+
+  // didn't get any hits.  this is success if it's a negative
+  // pattern, failure otherwise.
+  if (options.flipNegate) return false
+  return this.negate
+}
+
+// set partial to true to test if, for example,
+// "/a/b" matches the start of "/*/b/*/d"
+// Partial means, if you run out of file before you run
+// out of pattern, then that's fine, as long as all
+// the parts match.
+Minimatch.prototype.matchOne = function (file, pattern, partial) {
+  var options = this.options
+
+  this.debug('matchOne',
+    { 'this': this, file: file, pattern: pattern })
+
+  this.debug('matchOne', file.length, pattern.length)
+
+  for (var fi = 0,
+      pi = 0,
+      fl = file.length,
+      pl = pattern.length
+      ; (fi < fl) && (pi < pl)
+      ; fi++, pi++) {
+    this.debug('matchOne loop')
+    var p = pattern[pi]
+    var f = file[fi]
+
+    this.debug(pattern, p, f)
+
+    // should be impossible.
+    // some invalid regexp stuff in the set.
+    if (p === false) return false
+
+    if (p === GLOBSTAR) {
+      this.debug('GLOBSTAR', [pattern, p, f])
+
+      // "**"
+      // a/**/b/**/c would match the following:
+      // a/b/x/y/z/c
+      // a/x/y/z/b/c
+      // a/b/x/b/x/c
+      // a/b/c
+      // To do this, take the rest of the pattern after
+      // the **, and see if it would match the file remainder.
+      // If so, return success.
+      // If not, the ** "swallows" a segment, and try again.
+      // This is recursively awful.
+      //
+      // a/**/b/**/c matching a/b/x/y/z/c
+      // - a matches a
+      // - doublestar
+      //   - matchOne(b/x/y/z/c, b/**/c)
+      //     - b matches b
+      //     - doublestar
+      //       - matchOne(x/y/z/c, c) -> no
+      //       - matchOne(y/z/c, c) -> no
+      //       - matchOne(z/c, c) -> no
+      //       - matchOne(c, c) yes, hit
+      var fr = fi
+      var pr = pi + 1
+      if (pr === pl) {
+        this.debug('** at the end')
+        // a ** at the end will just swallow the rest.
+        // We have found a match.
+        // however, it will not swallow /.x, unless
+        // options.dot is set.
+        // . and .. are *never* matched by **, for explosively
+        // exponential reasons.
+        for (; fi < fl; fi++) {
+          if (file[fi] === '.' || file[fi] === '..' ||
+            (!options.dot && file[fi].charAt(0) === '.')) return false
+        }
+        return true
+      }
+
+      // ok, let's see if we can swallow whatever we can.
+      while (fr < fl) {
+        var swallowee = file[fr]
+
+        this.debug('\nglobstar while', file, fr, pattern, pr, swallowee)
+
+        // XXX remove this slice.  Just pass the start index.
+        if (this.matchOne(file.slice(fr), pattern.slice(pr), partial)) {
+          this.debug('globstar found match!', fr, fl, swallowee)
+          // found a match.
+          return true
+        } else {
+          // can't swallow "." or ".." ever.
+          // can only swallow ".foo" when explicitly asked.
+          if (swallowee === '.' || swallowee === '..' ||
+            (!options.dot && swallowee.charAt(0) === '.')) {
+            this.debug('dot detected!', file, fr, pattern, pr)
+            break
+          }
+
+          // ** swallows a segment, and continue.
+          this.debug('globstar swallow a segment, and continue')
+          fr++
+        }
+      }
+
+      // no match was found.
+      // However, in partial mode, we can't say this is necessarily over.
+      // If there's more *pattern* left, then
+      if (partial) {
+        // ran out of file
+        this.debug('\n>>> no match, partial?', file, fr, pattern, pr)
+        if (fr === fl) return true
+      }
+      return false
+    }
+
+    // something other than **
+    // non-magic patterns just have to match exactly
+    // patterns with magic have been turned into regexps.
+    var hit
+    if (typeof p === 'string') {
+      if (options.nocase) {
+        hit = f.toLowerCase() === p.toLowerCase()
+      } else {
+        hit = f === p
+      }
+      this.debug('string match', p, f, hit)
+    } else {
+      hit = f.match(p)
+      this.debug('pattern match', p, f, hit)
+    }
+
+    if (!hit) return false
+  }
+
+  // Note: ending in / means that we'll get a final ""
+  // at the end of the pattern.  This can only match a
+  // corresponding "" at the end of the file.
+  // If the file ends in /, then it can only match a
+  // a pattern that ends in /, unless the pattern just
+  // doesn't have any more for it. But, a/b/ should *not*
+  // match "a/b/*", even though "" matches against the
+  // [^/]*? pattern, except in partial mode, where it might
+  // simply not be reached yet.
+  // However, a/b/ should still satisfy a/*
+
+  // now either we fell off the end of the pattern, or we're done.
+  if (fi === fl && pi === pl) {
+    // ran out of pattern and filename at the same time.
+    // an exact hit!
+    return true
+  } else if (fi === fl) {
+    // ran out of file, but still had pattern left.
+    // this is ok if we're doing the match as part of
+    // a glob fs traversal.
+    return partial
+  } else if (pi === pl) {
+    // ran out of pattern, still have file left.
+    // this is only acceptable if we're on the very last
+    // empty segment of a file with a trailing slash.
+    // a/* should match a/b/
+    var emptyFileEnd = (fi === fl - 1) && (file[fi] === '')
+    return emptyFileEnd
+  }
+
+  // should be unreachable.
+  throw new Error('wtf?')
+}
+
+// replace stuff like \* with *
+function globUnescape (s) {
+  return s.replace(/\\(.)/g, '$1')
+}
+
+function regExpEscape (s) {
+  return s.replace(/[-[\]{}()*+?.,\\^$|#\s]/g, '\\$&')
+}
diff --git a/node_modules/dir-compare/node_modules/minimatch/package.json b/node_modules/dir-compare/node_modules/minimatch/package.json
new file mode 100644
index 0000000..c4514c8
--- /dev/null
+++ b/node_modules/dir-compare/node_modules/minimatch/package.json
@@ -0,0 +1,30 @@
+{
+  "author": "Isaac Z. Schlueter <i@izs.me> (http://blog.izs.me)",
+  "name": "minimatch",
+  "description": "a glob matcher in javascript",
+  "version": "3.0.4",
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/isaacs/minimatch.git"
+  },
+  "main": "minimatch.js",
+  "scripts": {
+    "test": "tap test/*.js --cov",
+    "preversion": "npm test",
+    "postversion": "npm publish",
+    "postpublish": "git push origin --all; git push origin --tags"
+  },
+  "engines": {
+    "node": "*"
+  },
+  "dependencies": {
+    "brace-expansion": "^1.1.7"
+  },
+  "devDependencies": {
+    "tap": "^10.3.2"
+  },
+  "license": "ISC",
+  "files": [
+    "minimatch.js"
+  ]
+}
diff --git a/node_modules/dir-compare/package.json b/node_modules/dir-compare/package.json
new file mode 100644
index 0000000..d5ccb56
--- /dev/null
+++ b/node_modules/dir-compare/package.json
@@ -0,0 +1,59 @@
+{
+    "name": "dir-compare",
+    "version": "2.4.0",
+    "description": "Node JS directory compare",
+    "main": "src/index.js",
+    "types": "src/index.d.ts",
+    "repository": {
+        "type": "git",
+        "url": "https://github.com/gliviu/dir-compare"
+    },
+    "keywords": [
+        "compare",
+        "directory",
+        "folder"
+    ],
+    "files": [
+        "src"
+    ],
+    "scripts": {
+        "clean": "rm -rf build && rm -rf .nyc_output && rm -rf coverage",
+        "copydeps": "copyfiles \"test/expected/**\" test/testdir.tar \"test/extended/res/**\" package.json build",
+        "build": "tsc && npm run copydeps",
+        "lint": "tslint -p tsconfig.json",
+        "pretest": "npm install && npm run build",
+        "test": "node build/test/runTests.js",
+        "extest": "npm run pretest && ./test/extended/init.sh && test/extended/runall.sh",
+        "coverage": "npx nyc --exclude \"build/test/**\" --reporter=lcov npm test && npx nyc report",
+        "toc": "npx markdown-toc README.md; echo \n",
+        "docs": "typedoc --includeVersion --includeDeclarations --excludeExternals --theme minimal --mode file --readme none --gitRevision master --toc compare,compareSync,fileCompareHandlers,Options,Result --out docs ./src/index.d.ts"
+    },
+    "dependencies": {
+        "buffer-equal": "1.0.0",
+        "colors": "1.0.3",
+        "commander": "2.9.0",
+        "minimatch": "3.0.4"
+    },
+    "devDependencies": {
+        "@types/node": "^12.11.7",
+        "copyfiles": "^1.2.0",
+        "memory-streams": "0.1.0",
+        "semver": "5.6.0",
+        "shelljs": "0.3.0",
+        "tar-fs": "2.1.1",
+        "temp": "0.9.0",
+        "ts-node": "^8.5.4",
+        "tslint": "^5.20.0",
+        "tslint-config-prettier": "^1.13.0",
+        "typedoc": "0.19.2",
+        "typescript": "^3.7.4"
+    },
+    "bin": {
+        "dircompare": "src/cli/dircompare.js"
+    },
+    "author": "Liviu Grigorescu",
+    "license": "MIT",
+    "bugs": {
+        "url": "https://github.com/gliviu/dir-compare/issues"
+    }
+}
diff --git a/node_modules/dir-compare/src/cli/dircompare.js b/node_modules/dir-compare/src/cli/dircompare.js
new file mode 100755
index 0000000..593621d
--- /dev/null
+++ b/node_modules/dir-compare/src/cli/dircompare.js
@@ -0,0 +1,147 @@
+#!/usr/bin/env node
+
+var program = require('commander')
+var dircompare = require('../index')
+var fs = require('fs')
+var util = require('util')
+var print = require('./print')
+var pjson = require('../../package.json')
+
+program
+    .version(pjson.version)
+    .usage('[options] leftdir rightdir')
+    .option('-c, --compare-content', 'compare files by content')
+    .option('-D, --compare-date', 'compare files by date')
+    .option('--date-tolerance [type]', 'tolerance to be used in date comparison (milliseconds)')
+    .option('--compare-symlink', 'compare files and directories by symlink')
+    .option('-f, --filter [type]', 'file name filter', undefined)
+    .option('-x, --exclude [type]', 'file/directory name exclude filter', undefined)
+    .option('-S, --skip-subdirs', 'do not recurse into subdirectories')
+    .option('-L, --skip-symlinks', 'ignore symlinks')
+    .option('-i, --ignore-case', 'ignores case when comparing file names')
+    .option('-l, --show-left', 'report - show entries occurring in left dir')
+    .option('-r, --show-right', 'report - show entries occurring in right dir')
+    .option('-e, --show-equal', 'report - show identic entries occurring in both dirs')
+    .option('-d, --show-distinct', 'report - show distinct entries occurring in both dirs')
+    .option('-a, --show-all', 'report - show all entries')
+    .option('-w, --whole-report', 'report - include directories in detailed report')
+    .option('--reason', 'report - show reason when entries are distinct')
+    .option('--csv', 'report - print details as csv')
+    .option('--nocolors', 'don\'t use console colors')
+    .option('--async', 'Make use of multiple cores')
+
+
+program.on('--help', function () {
+    console.log('  By default files are compared by size.')
+    console.log('  --date-tolerance defaults to 1000 ms. Two files are considered to have')
+    console.log('  the same date if the difference between their modification dates fits')
+    console.log('  within date tolerance.')
+    console.log()
+    console.log('  Exit codes:')
+    console.log('    0 - entries are identical')
+    console.log('    1 - entries are different')
+    console.log('    2 - error occurred')
+    console.log()
+    console.log('  Examples:')
+    console.log('  compare by content         dircompare -c dir1 dir2')
+    console.log('  show only different files  dircompare -d dir1 dir2')
+    console.log()
+    console.log('  exclude filter             dircompare -x ".git,node_modules" dir1 dir2')
+    console.log('                             dircompare -x "/tests/expected" dir1 dir2')
+    console.log('                             dircompare -x "**/expected" dir1 dir2')
+    console.log('                             dircompare -x "**/tests/**/*.ts" dir1 dir2')
+    console.log()
+    console.log('  include filter             dircompare -f "*.js,*.yml" dir1 dir2')
+    console.log('                             dircompare -f "/tests/**/*.js" dir1 dir2')
+    console.log('                             dircompare -f "**/tests/**/*.ts" dir1 dir2')
+})
+
+// Fix for https://github.com/tj/commander.js/issues/125
+program.allowUnknownOption()
+program.parse(process.argv)
+var parsed = program.parseOptions(program.normalize(process.argv.slice(2)))
+if (parsed.unknown.length > 0) {
+    console.error('Unknown options: ' + parsed.unknown)
+    process.exit(2)
+}
+
+var run = function () {
+    try {
+        if (program.args.length !== 2) {
+            program.outputHelp()
+            process.exit(2)
+        } else {
+            var options = {}
+
+
+            options.compareContent = program.compareContent
+            options.compareDate = program.compareDate
+            options.compareSymlink = program.compareSymlink
+            options.compareSize = true
+            options.skipSubdirs = program.skipSubdirs
+            options.skipSymlinks = program.skipSymlinks
+            options.ignoreCase = program.ignoreCase
+            options.includeFilter = program.filter
+            options.excludeFilter = program.exclude
+            options.noDiffSet = !(program.showAll || program.showEqual || program.showLeft || program.showRight || program.showDistinct)
+            options.dateTolerance = program.dateTolerance || 1000
+
+            var async = program.async
+
+            var path1 = program.args[0]
+            var path2 = program.args[1]
+            var abort = false
+            if (!isNumeric(options.dateTolerance)) {
+                console.error("Numeric value expected for --date-tolerance")
+                abort = true
+            }
+            if (!fs.existsSync(path1)) {
+                console.error(util.format("Path '%s' missing"), path1)
+                abort = true
+            }
+            if (!fs.existsSync(path2)) {
+                console.error(util.format("Path '%s' missing"), path2)
+                abort = true
+            }
+            if (!abort) {
+                // compare
+                var comparePromise
+                if (async) {
+                    comparePromise = dircompare.compare(path1, path2, options)
+                } else {
+                    comparePromise = new Promise(function (resolve, reject) {
+                        resolve(dircompare.compareSync(path1, path2, options))
+                    })
+                }
+
+                comparePromise.then(
+                    function (res) {
+                        // PRINT DETAILS
+                        print(res, process.stdout, program)
+                        if (res.same) {
+                            process.exit(0)
+                        } else {
+                            process.exit(1)
+                        }
+                    },
+                    function (error) {
+                        console.error('Error occurred: ' + (error instanceof Error ? error.stack : error))
+                        process.exit(2)
+                    })
+            } else {
+                process.exit(2)
+            }
+        }
+    } catch (e) {
+        console.error(e.stack)
+        process.exit(2)
+    }
+}
+
+function isNumeric(n) {
+    return !isNaN(parseFloat(n)) && isFinite(n)
+}
+
+
+
+run()
diff --git a/node_modules/dir-compare/src/cli/print.js b/node_modules/dir-compare/src/cli/print.js
new file mode 100644
index 0000000..9861896
--- /dev/null
+++ b/node_modules/dir-compare/src/cli/print.js
@@ -0,0 +1,192 @@
+var colors = require('colors')
+var util = require('util')
+var pathUtils = require('path')
+
+var PATH_SEP = pathUtils.sep
+
+// Prints dir compare results.
+// 'program' represents display options and correspond to dircompare command line parameters.
+// Example: 'dircompare --show-all --exclude *.js dir1 dir2' translates into
+// program: {showAll: true, exclude: '*.js'}
+//
+var print = function (res, writer, program) {
+    var noColor = function (str) { return str }
+    var colorEqual = program.nocolors ? noColor : colors.green
+    var colorDistinct = program.nocolors ? noColor : colors.red
+    var colorLeft = noColor
+    var colorRight = noColor
+    var colorDir = noColor
+    var colorBrokenLinks = noColor
+    var colorMissing = program.nocolors ? noColor : colors.yellow
+
+    // calculate relative path length for pretty print
+    var relativePathMaxLength = 0, fileNameMaxLength = 0
+    if (!program.csv && res.diffSet) {
+        res.diffSet.forEach(function (diff) {
+            if (diff.relativePath.length > relativePathMaxLength) {
+                relativePathMaxLength = diff.relativePath.length
+            }
+            var len = getCompareFile(diff, '??', colorMissing).length
+            if (len > fileNameMaxLength) {
+                fileNameMaxLength = len
+            }
+        })
+    }
+
+    // csv header
+    if (program.csv) {
+        writer.write('path,name,state,type,size1,size2,date1,date2,reason\n')
+    }
+    if (res.diffSet) {
+        for (var i = 0; i < res.diffSet.length; i++) {
+            var detail = res.diffSet[i]
+            var color, show = true
+
+            if (!program.wholeReport) {
+                // show only files or broken links
+                var type = detail.type1 !== 'missing' ? detail.type1 : detail.type2
+                if (type !== 'file' && type !== 'broken-link') {
+                    show = false
+                }
+            }
+            if (show) {
+                switch (detail.state) {
+                    case 'equal':
+                        color = colorEqual
+                        show = program.showAll || program.showEqual ? true : false
+                        break
+                    case 'left':
+                        color = colorLeft
+                        show = program.showAll || program.showLeft ? true : false
+                        break
+                    case 'right':
+                        color = colorRight
+                        show = program.showAll || program.showRight ? true : false
+                        break
+                    case 'distinct':
+                        color = colorDistinct
+                        show = program.showAll || program.showDistinct ? true : false
+                        break
+                    default:
+                        show = true
+                        color = colors.gray
+                }
+                if (show) {
+                    if (program.csv) {
+                        printCsv(writer, detail, color)
+                    } else {
+                        printPretty(writer, program, detail, color, colorDir, colorMissing, relativePathMaxLength, fileNameMaxLength)
+                    }
+                }
+            }
+        }
+    }
+
+    // PRINT STATISTICS
+    var statTotal, statEqual, statLeft, statRight, statDistinct
+    if (program.wholeReport) {
+        statTotal = res.total
+        statEqual = res.equal
+        statLeft = res.left
+        statRight = res.right
+        statDistinct = res.distinct
+    } else {
+        var brokenLInksStats = res.brokenLinks
+        statTotal = res.totalFiles + brokenLInksStats.totalBrokenLinks
+        statEqual = res.equalFiles
+        statLeft = res.leftFiles + brokenLInksStats.leftBrokenLinks
+        statRight = res.rightFiles + brokenLInksStats.rightBrokenLinks
+        statDistinct = res.distinctFiles + brokenLInksStats.distinctBrokenLinks
+    }
+    if (!program.noDiffIndicator) {
+        writer.write(res.same ? colorEqual('Entries are identical\n') : colorDistinct('Entries are different\n'))
+    }
+    var stats = util.format('total: %s, equal: %s, distinct: %s, only left: %s, only right: %s',
+        statTotal,
+        colorEqual(statEqual),
+        colorDistinct(statDistinct),
+        colorLeft(statLeft),
+        colorRight(statRight)
+    )
+    if (res.brokenLinks.totalBrokenLinks > 0) {
+        stats += util.format(', broken links: %s', colorBrokenLinks(res.brokenLinks.totalBrokenLinks))
+    }
+    stats += '\n'
+    writer.write(stats)
+}
+
+/**
+ * Print details for default view mode
+ */
+var printPretty = function (writer, program, detail, color, dirColor, missingColor, relativePathMaxLength, fileNameMaxLength) {
+    var path = detail.relativePath === '' ? PATH_SEP : detail.relativePath
+
+    var state
+    switch (detail.state) {
+        case 'equal':
+            state = '=='
+            break
+        case 'left':
+            state = '->'
+            break
+        case 'right':
+            state = '<-'
+            break
+        case 'distinct':
+            state = '<>'
+            break
+        default:
+            state = '?'
+    }
+    var type = ''
+    type = detail.type1 !== 'missing' ? detail.type1 : detail.type2
+    if (type === 'directory') {
+        type = dirColor(type)
+    }
+    var cmpEntry = getCompareFile(detail, color(state), missingColor)
+    var reason = ''
+    if (program.reason && detail.reason) {
+        reason = util.format(' <%s>', detail.reason)
+    }
+    if (program.wholeReport || type === 'broken-link') {
+        writer.write(util.format('[%s] %s (%s)%s\n', path, cmpEntry, type, reason))
+    } else {
+        writer.write(util.format('[%s] %s%s\n', path, cmpEntry, reason))
+    }
+}
+
+var getCompareFile = function (detail, state, missingcolor) {
+    p1 = detail.name1 ? detail.name1 : ''
+    p2 = detail.name2 ? detail.name2 : ''
+    var missing1 = detail.type1 === 'missing' ? missingcolor('missing') : ''
+    var missing2 = detail.type2 === 'missing' ? missingcolor('missing') : ''
+    return util.format('%s%s %s %s%s', missing1, p1, state, missing2, p2)
+}
+
+/**
+ * Print csv details.
+ */
+var printCsv = function (writer, detail, color) {
+    var size1 = '', size2 = ''
+    if (detail.type1 === 'file') {
+        size1 = detail.size1 !== undefined ? detail.size1 : ''
+    }
+    if (detail.type2 === 'file') {
+        size2 = detail.size2 !== undefined ? detail.size2 : ''
+    }
+
+    var date1 = '', date2 = ''
+    date1 = detail.date1 !== undefined ? detail.date1.toISOString() : ''
+    date2 = detail.date2 !== undefined ? detail.date2.toISOString() : ''
+
+    var type = ''
+    type = detail.type1 !== 'missing' ? detail.type1 : detail.type2
+
+    var path = detail.relativePath ? detail.relativePath : PATH_SEP
+    var name = (detail.name1 ? detail.name1 : detail.name2)
+    var reason = detail.reason || ''
+
+    writer.write(util.format('%s,%s,%s,%s,%s,%s,%s,%s,%s\n', path, name, color(detail.state), type, size1, size2, date1, date2, reason))
+}
+
+module.exports = print
diff --git a/node_modules/dir-compare/src/compareAsync.js b/node_modules/dir-compare/src/compareAsync.js
new file mode 100644
index 0000000..26a9d68
--- /dev/null
+++ b/node_modules/dir-compare/src/compareAsync.js
@@ -0,0 +1,141 @@
+var fs = require('fs')
+var entryBuilder = require('./entry/entryBuilder')
+var entryEquality = require('./entry/entryEquality')
+var stats = require('./statistics/statisticsUpdate')
+var pathUtils = require('path')
+var fsPromise = require('./fs/fsPromise')
+var loopDetector = require('./symlink/loopDetector')
+var entryComparator = require('./entry/entryComparator')
+var entryType = require('./entry/entryType')
+
+/**
+ * Returns the sorted list of entries in a directory.
+ */
+var getEntries = function (rootEntry, relativePath, loopDetected, options) {
+    if (!rootEntry || loopDetected) {
+        return Promise.resolve([])
+    }
+    if (rootEntry.isDirectory) {
+        return fsPromise.readdir(rootEntry.absolutePath)
+            .then(function (entries) {
+                return entryBuilder.buildDirEntries(rootEntry, entries, relativePath, options)
+            })
+    }
+    return Promise.resolve([rootEntry])
+}
+
+/**
+ * Compares two directories asynchronously.
+ */
+var compare = function (rootEntry1, rootEntry2, level, relativePath, options, statistics, diffSet, symlinkCache) {
+    var loopDetected1 = loopDetector.detectLoop(rootEntry1, symlinkCache.dir1)
+    var loopDetected2 = loopDetector.detectLoop(rootEntry2, symlinkCache.dir2)
+    loopDetector.updateSymlinkCache(symlinkCache, rootEntry1, rootEntry2, loopDetected1, loopDetected2)
+
+    return Promise.all([getEntries(rootEntry1, relativePath, loopDetected1, options), getEntries(rootEntry2, relativePath, loopDetected2, options)]).then(
+        function (entriesResult) {
+            var entries1 = entriesResult[0]
+            var entries2 = entriesResult[1]
+            var i1 = 0, i2 = 0
+            var comparePromises = []
+            var compareFilePromises = []
+            var subDiffSet
+
+            while (i1 < entries1.length || i2 < entries2.length) {
+                var entry1 = entries1[i1]
+                var entry2 = entries2[i2]
+                var type1, type2
+
+                // compare entry name (-1, 0, 1)
+                var cmp
+                if (i1 < entries1.length && i2 < entries2.length) {
+                    cmp = entryComparator.compareEntry(entry1, entry2, options)
+                    type1 = entryType.getType(entry1)
+                    type2 = entryType.getType(entry2)
+                } else if (i1 < entries1.length) {
+                    type1 = entryType.getType(entry1)
+                    type2 = entryType.getType(undefined)
+                    cmp = -1
+                } else {
+                    type1 = entryType.getType(undefined)
+                    type2 = entryType.getType(entry2)
+                    cmp = 1
+                }
+
+                // process entry
+                if (cmp === 0) {
+                    // Both left/right exist and have the same name and type
+                    var compareAsyncRes = entryEquality.isEntryEqualAsync(entry1, entry2, type1, diffSet, options)
+                    var samePromise = compareAsyncRes.samePromise
+                    var same = compareAsyncRes.same
+                    if (same !== undefined) {
+                        options.resultBuilder(entry1, entry2,
+                            same ? 'equal' : 'distinct',
+                            level, relativePath, options, statistics, diffSet,
+                            compareAsyncRes.reason)
+                        stats.updateStatisticsBoth(entry1, entry2, compareAsyncRes.same, compareAsyncRes.reason, type1, statistics, options)
+                    } else {
+                        compareFilePromises.push(samePromise)
+                    }
+
+                    i1++
+                    i2++
+                    if (!options.skipSubdirs && type1 === 'directory') {
+                        if (!options.noDiffSet) {
+                            subDiffSet = []
+                            diffSet.push(subDiffSet)
+                        }
+                        comparePromises.push(compare(entry1, entry2, level + 1,
+                            pathUtils.join(relativePath, entry1.name),
+                            options, statistics, subDiffSet, loopDetector.cloneSymlinkCache(symlinkCache)))
+                    }
+                } else if (cmp < 0) {
+                    // Right missing
+                    options.resultBuilder(entry1, undefined, 'left', level, relativePath, options, statistics, diffSet)
+                    stats.updateStatisticsLeft(entry1, type1, statistics, options)
+                    i1++
+                    if (type1 === 'directory' && !options.skipSubdirs) {
+                        if (!options.noDiffSet) {
+                            subDiffSet = []
+                            diffSet.push(subDiffSet)
+                        }
+                        comparePromises.push(compare(entry1, undefined,
+                            level + 1,
+                            pathUtils.join(relativePath, entry1.name), options, statistics, subDiffSet, loopDetector.cloneSymlinkCache(symlinkCache)))
+                    }
+                } else {
+                    // Left missing
+                    options.resultBuilder(undefined, entry2, 'right', level, relativePath, options, statistics, diffSet)
+                    stats.updateStatisticsRight(entry2, type2, statistics, options)
+                    i2++
+                    if (type2 === 'directory' && !options.skipSubdirs) {
+                        if (!options.noDiffSet) {
+                            subDiffSet = []
+                            diffSet.push(subDiffSet)
+                        }
+                        comparePromises.push(compare(undefined, entry2,
+                            level + 1,
+                            pathUtils.join(relativePath, entry2.name), options, statistics, subDiffSet, loopDetector.cloneSymlinkCache(symlinkCache)))
+                    }
+                }
+            }
+            return Promise.all(comparePromises).then(function () {
+                return Promise.all(compareFilePromises).then(function (sameResults) {
+                    for (var i = 0; i < sameResults.length; i++) {
+                        var sameResult = sameResults[i]
+                        if (sameResult.error) {
+                            return Promise.reject(sameResult.error)
+                        } else {
+                            options.resultBuilder(sameResult.entry1, sameResult.entry2,
+                                sameResult.same ? 'equal' : 'distinct',
+                                level, relativePath, options, statistics, sameResult.diffSet,
+                                sameResult.reason)
+                            stats.updateStatisticsBoth(sameResult.entries1, sameResult.entries2, sameResult.same, sameResult.reason, sameResult.type1, statistics, options)
+                        }
+                    }
+                })
+            })
+        })
+}
+
+module.exports = compare
diff --git a/node_modules/dir-compare/src/compareSync.js b/node_modules/dir-compare/src/compareSync.js
new file mode 100644
index 0000000..84ff4b3
--- /dev/null
+++ b/node_modules/dir-compare/src/compareSync.js
@@ -0,0 +1,90 @@
+var fs = require('fs')
+var pathUtils = require('path')
+var entryBuilder = require('./entry/entryBuilder')
+var entryEquality = require('./entry/entryEquality')
+var stats = require('./statistics/statisticsUpdate')
+var loopDetector = require('./symlink/loopDetector')
+var entryComparator = require('./entry/entryComparator')
+var entryType = require('./entry/entryType')
+
+/**
+ * Returns the sorted list of entries in a directory.
+ */
+var getEntries = function (rootEntry, relativePath, loopDetected, options) {
+    if (!rootEntry || loopDetected) {
+        return []
+    }
+    if (rootEntry.isDirectory) {
+        var entries = fs.readdirSync(rootEntry.absolutePath)
+        return entryBuilder.buildDirEntries(rootEntry, entries, relativePath, options)
+    }
+    return [rootEntry]
+}
+
+/**
+ * Compares two directories synchronously.
+ */
+var compare = function (rootEntry1, rootEntry2, level, relativePath, options, statistics, diffSet, symlinkCache) {
+    var loopDetected1 = loopDetector.detectLoop(rootEntry1, symlinkCache.dir1)
+    var loopDetected2 = loopDetector.detectLoop(rootEntry2, symlinkCache.dir2)
+    loopDetector.updateSymlinkCache(symlinkCache, rootEntry1, rootEntry2, loopDetected1, loopDetected2)
+
+    var entries1 = getEntries(rootEntry1, relativePath, loopDetected1, options)
+    var entries2 = getEntries(rootEntry2, relativePath, loopDetected2, options)
+    var i1 = 0, i2 = 0
+    while (i1 < entries1.length || i2 < entries2.length) {
+        var entry1 = entries1[i1]
+        var entry2 = entries2[i2]
+        var type1, type2
+
+        // compare entry name (-1, 0, 1)
+        var cmp
+        if (i1 < entries1.length && i2 < entries2.length) {
+            cmp = entryComparator.compareEntry(entry1, entry2, options)
+            type1 = entryType.getType(entry1)
+            type2 = entryType.getType(entry2)
+        } else if (i1 < entries1.length) {
+            type1 = entryType.getType(entry1)
+            type2 = entryType.getType(undefined)
+            cmp = -1
+        } else {
+            type1 = entryType.getType(undefined)
+            type2 = entryType.getType(entry2)
+            cmp = 1
+        }
+
+        // process entry
+        if (cmp === 0) {
+            // Both left/right exist and have the same name and type
+            var compareEntryRes = entryEquality.isEntryEqualSync(entry1, entry2, type1, options)
+            options.resultBuilder(entry1, entry2,
+                compareEntryRes.same ? 'equal' : 'distinct',
+                level, relativePath, options, statistics, diffSet,
+                compareEntryRes.reason)
+            stats.updateStatisticsBoth(entry1, entry2, compareEntryRes.same, compareEntryRes.reason, type1, statistics, options)
+            i1++
+            i2++
+            if (!options.skipSubdirs && type1 === 'directory') {
+                compare(entry1, entry2, level + 1, pathUtils.join(relativePath, entry1.name), options, statistics, diffSet, loopDetector.cloneSymlinkCache(symlinkCache))
+            }
+        } else if (cmp < 0) {
+            // Right missing
+            options.resultBuilder(entry1, undefined, 'left', level, relativePath, options, statistics, diffSet)
+            stats.updateStatisticsLeft(entry1, type1, statistics, options)
+            i1++
+            if (type1 === 'directory' && !options.skipSubdirs) {
+                compare(entry1, undefined, level + 1, pathUtils.join(relativePath, entry1.name), options, statistics, diffSet, loopDetector.cloneSymlinkCache(symlinkCache))
+            }
+        } else {
+            // Left missing
+            options.resultBuilder(undefined, entry2, 'right', level, relativePath, options, statistics, diffSet)
+            stats.updateStatisticsRight(entry2, type2, statistics, options)
+            i2++
+            if (type2 === 'directory' && !options.skipSubdirs) {
+                compare(undefined, entry2, level + 1, pathUtils.join(relativePath, entry2.name), options, statistics, diffSet, loopDetector.cloneSymlinkCache(symlinkCache))
+            }
+        }
+    }
+}
+
+module.exports = compare
diff --git a/node_modules/dir-compare/src/entry/entryBuilder.js b/node_modules/dir-compare/src/entry/entryBuilder.js
new file mode 100644
index 0000000..6a46c62
--- /dev/null
+++ b/node_modules/dir-compare/src/entry/entryBuilder.js
@@ -0,0 +1,102 @@
+var fs = require('fs')
+var minimatch = require('minimatch')
+var pathUtils = require('path')
+var entryComparator = require('./entryComparator')
+
+var PATH_SEP = pathUtils.sep
+
+module.exports = {
+	/**
+	 * Returns the sorted list of entries in a directory.
+	 */
+	buildDirEntries: function (rootEntry, dirEntries, relativePath, options) {
+		var res = []
+		for (var i = 0; i < dirEntries.length; i++) {
+			var entryName = dirEntries[i]
+			var entryAbsolutePath = rootEntry.absolutePath + PATH_SEP + entryName
+			var entryPath = rootEntry.path + PATH_SEP + entryName
+
+			var entry = this.buildEntry(entryAbsolutePath, entryPath, entryName)
+			if (options.skipSymlinks && entry.isSymlink) {
+				entry.stat = undefined
+			}
+
+			if (filterEntry(entry, relativePath, options)) {
+				res.push(entry)
+			}
+		}
+		return res.sort((a, b) => entryComparator.compareEntry(a, b, options))
+	},
+
+	buildEntry: function (absolutePath, path, name) {
+		var stats = getStatIgnoreBrokenLink(absolutePath)
+
+		return {
+			name: name,
+			absolutePath: absolutePath,
+			path: path,
+			stat: stats.stat,
+			lstat: stats.lstat,
+			isSymlink: stats.lstat.isSymbolicLink(),
+			isBrokenLink: stats.isBrokenLink,
+			isDirectory: stats.stat.isDirectory()
+		}
+	},
+
+}
+
+
+function getStatIgnoreBrokenLink(absolutePath) {
+	var lstat = fs.lstatSync(absolutePath)
+	try {
+		return {
+			stat: fs.statSync(absolutePath),
+			lstat: lstat,
+			isBrokenLink: false
+		}
+	} catch (error) {
+		if (error.code === 'ENOENT') {
+			return {
+				stat: lstat,
+				lstat: lstat,
+				isBrokenLink: true
+			}
+		}
+		throw error
+	}
+}
+
+/**
+ * Filter entries by file name. Returns true if the file is to be processed.
+ */
+function filterEntry(entry, relativePath, options) {
+	if (entry.isSymlink && options.skipSymlinks) {
+		return false
+	}
+	var path = pathUtils.join(relativePath, entry.name)
+
+	if ((entry.stat.isFile() && options.includeFilter) && (!match(path, options.includeFilter))) {
+		return false
+	}
+
+	if ((options.excludeFilter) && (match(path, options.excludeFilter))) {
+		return false
+	}
+
+	return true
+}
+
+/**
+ * Matches path by pattern.
+ */
+function match(path, pattern) {
+	var patternArray = pattern.split(',')
+	for (var i = 0; i < patternArray.length; i++) {
+		var pat = patternArray[i]
+		if (minimatch(path, pat, { dot: true, matchBase: true })) { //nocase
+			return true
+		}
+	}
+	return false
+}
+
diff --git a/node_modules/dir-compare/src/entry/entryComparator.js b/node_modules/dir-compare/src/entry/entryComparator.js
new file mode 100644
index 0000000..d0361f5
--- /dev/null
+++ b/node_modules/dir-compare/src/entry/entryComparator.js
@@ -0,0 +1,20 @@
+/**
+ * Determines order criteria for sorting entries in a directory.
+ */
+module.exports = {
+	compareEntry: function (a, b, options) {
+		if (a.isBrokenLink && b.isBrokenLink) {
+			return options.compareNameHandler(a.name, b.name, options)
+		} else if (a.isBrokenLink) {
+			return -1
+		} else if (b.isBrokenLink) {
+			return 1
+		} else if (a.stat.isDirectory() && b.stat.isFile()) {
+			return -1
+		} else if (a.stat.isFile() && b.stat.isDirectory()) {
+			return 1
+		} else {
+			return options.compareNameHandler(a.name, b.name, options)
+		}
+	}
+}
diff --git a/node_modules/dir-compare/src/entry/entryEquality.js b/node_modules/dir-compare/src/entry/entryEquality.js
new file mode 100644
index 0000000..f1b8d78
--- /dev/null
+++ b/node_modules/dir-compare/src/entry/entryEquality.js
@@ -0,0 +1,135 @@
+var fs = require('fs')
+/**
+ * Compares two entries with identical name and type.
+ */
+module.exports = {
+    isEntryEqualSync: function (entry1, entry2, type, options) {
+        if (type === 'file') {
+            return isFileEqualSync(entry1, entry2, options)
+        }
+        if (type === 'directory') {
+            return isDirectoryEqual(entry1, entry2, options)
+        }
+        if (type === 'broken-link') {
+            return isBrokenLinkEqual()
+        }
+        throw new Error('Unexpected type ' + type)
+    },
+
+    isEntryEqualAsync: function (entry1, entry2, type, diffSet, options) {
+        if (type === 'file') {
+            return isFileEqualAsync(entry1, entry2, type, diffSet, options)
+        }
+        if (type === 'directory') {
+            return isDirectoryEqual(entry1, entry2, options)
+        }
+        if (type === 'broken-link') {
+            return isBrokenLinkEqual()
+        }
+        throw new Error('Unexpected type ' + type)
+    }
+}
+
+
+function isFileEqualSync(entry1, entry2, options) {
+    var p1 = entry1 ? entry1.absolutePath : undefined
+    var p2 = entry2 ? entry2.absolutePath : undefined
+    if (options.compareSymlink && !isSymlinkEqual(entry1, entry2)) {
+        return { same: false, reason: 'different-symlink' }
+    }
+    if (options.compareSize && entry1.stat.size !== entry2.stat.size) {
+        return { same: false, reason: 'different-size' }
+    }
+    if (options.compareDate && !isDateEqual(entry1.stat.mtime, entry2.stat.mtime, options.dateTolerance)) {
+        return { same: false, reason: 'different-date' }
+    }
+    if (options.compareContent && !options.compareFileSync(p1, entry1.stat, p2, entry2.stat, options)) {
+        return { same: false, reason: 'different-content' }
+    }
+    return { same: true }
+}
+
+function isFileEqualAsync(entry1, entry2, type, diffSet, options) {
+    var p1 = entry1 ? entry1.absolutePath : undefined
+    var p2 = entry2 ? entry2.absolutePath : undefined
+    if (options.compareSymlink && !isSymlinkEqual(entry1, entry2)) {
+        return { same: false, reason: 'different-symlink' }
+    }
+    if (options.compareSize && entry1.stat.size !== entry2.stat.size) {
+        return { same: false, samePromise: undefined, reason: 'different-size' }
+    }
+
+    if (options.compareDate && !isDateEqual(entry1.stat.mtime, entry2.stat.mtime, options.dateTolerance)) {
+        return { same: false, samePromise: undefined, reason: 'different-date' }
+    }
+
+    if (options.compareContent) {
+        var samePromise = undefined
+        var subDiffSet
+        if (!options.noDiffSet) {
+            subDiffSet = []
+            diffSet.push(subDiffSet)
+        }
+        samePromise = options.compareFileAsync(p1, entry1.stat, p2, entry2.stat, options)
+            .then(function (comparisonResult) {
+                var same, error
+                if (typeof (comparisonResult) === "boolean") {
+                    same = comparisonResult
+                } else {
+                    error = comparisonResult
+                }
+
+                return {
+                    entry1: entry1, entry2: entry2, same: same,
+                    error: error, type1: type, type2: type,
+                    diffSet: subDiffSet,
+                    reason: same ? undefined : 'different-content'
+                }
+            })
+            .catch(function (error) {
+                return {
+                    error: error
+                }
+            })
+
+        return { same: undefined, samePromise: samePromise }
+    }
+
+    return { same: true, samePromise: undefined }
+}
+
+function isDirectoryEqual(entry1, entry2, options) {
+    if (options.compareSymlink && !isSymlinkEqual(entry1, entry2)) {
+        return { same: false, reason: 'different-symlink' }
+    }
+    return { same: true }
+}
+
+function isBrokenLinkEqual() {
+    return { same: false, reason: 'broken-link' } // broken links are never considered equal
+}
+
+/**
+ * Compares two dates and returns true/false depending on tolerance (milliseconds).
+ * Two dates are considered equal if the difference in milliseconds between them is less or equal than tolerance.
+ */
+function isDateEqual(date1, date2, tolerance) {
+    return Math.abs(date1.getTime() - date2.getTime()) <= tolerance ? true : false
+}
+
+/**
+ * Compares two entries for symlink equality.
+ */
+function isSymlinkEqual(entry1, entry2) {
+    if (!entry1.isSymlink && !entry2.isSymlink) {
+        return true
+    }
+    if (entry1.isSymlink && entry2.isSymlink && hasIdenticalLink(entry1.absolutePath, entry2.absolutePath)) {
+        return true
+    }
+    return false
+}
+
+function hasIdenticalLink(path1, path2) {
+    return fs.readlinkSync(path1) === fs.readlinkSync(path2)
+}
\ No newline at end of file
diff --git a/node_modules/dir-compare/src/entry/entryType.js b/node_modules/dir-compare/src/entry/entryType.js
new file mode 100644
index 0000000..5dac42a
--- /dev/null
+++ b/node_modules/dir-compare/src/entry/entryType.js
@@ -0,0 +1,18 @@
+
+module.exports = {
+	/**
+	 * One of 'missing','file','directory','broken-link'
+	 */
+	getType: function (entry) {
+		if (!entry) {
+			return 'missing'
+		}
+		if (entry.isBrokenLink) {
+			return 'broken-link'
+		}
+		if (entry.isDirectory) {
+			return 'directory'
+		}
+		return 'file'
+	}
+}
\ No newline at end of file
diff --git a/node_modules/dir-compare/src/fileCompareHandler/closeFile.js b/node_modules/dir-compare/src/fileCompareHandler/closeFile.js
new file mode 100644
index 0000000..10118e1
--- /dev/null
+++ b/node_modules/dir-compare/src/fileCompareHandler/closeFile.js
@@ -0,0 +1,28 @@
+var fs = require('fs')
+
+var closeFilesSync = function (fd1, fd2) {
+    if (fd1) {
+        fs.closeSync(fd1)
+    }
+    if (fd2) {
+        fs.closeSync(fd2)
+    }
+}
+
+var closeFilesAsync = function (fd1, fd2, fdQueue) {
+    if (fd1 && fd2) {
+        return fdQueue.promises.close(fd1).then(() => fdQueue.promises.close(fd2))
+    }
+    if (fd1) {
+        return fdQueue.promises.close(fd1)
+    }
+    if (fd2) {
+        return fdQueue.promises.close(fd2)
+    }
+}
+
+
+module.exports = {
+    closeFilesSync: closeFilesSync,
+    closeFilesAsync: closeFilesAsync
+}
diff --git a/node_modules/dir-compare/src/fileCompareHandler/defaultFileCompare.js b/node_modules/dir-compare/src/fileCompareHandler/defaultFileCompare.js
new file mode 100644
index 0000000..26188ca
--- /dev/null
+++ b/node_modules/dir-compare/src/fileCompareHandler/defaultFileCompare.js
@@ -0,0 +1,113 @@
+var fs = require('fs')
+var bufferEqual = require('buffer-equal')
+var FileDescriptorQueue = require('../fs/FileDescriptorQueue')
+var closeFilesSync = require('./closeFile').closeFilesSync
+var closeFilesAsync = require('./closeFile').closeFilesAsync
+var fsPromise = require('../fs/fsPromise')
+var BufferPool = require('../fs/BufferPool')
+
+var MAX_CONCURRENT_FILE_COMPARE = 8
+var BUF_SIZE = 100000
+var fdQueue = new FileDescriptorQueue(MAX_CONCURRENT_FILE_COMPARE * 2)
+var bufferPool = new BufferPool(BUF_SIZE, MAX_CONCURRENT_FILE_COMPARE);  // fdQueue guarantees there will be no more than MAX_CONCURRENT_FILE_COMPARE async processes accessing the buffers concurrently
+
+
+/**
+ * Compares two partial buffers.
+ */
+var compareBuffers = function (buf1, buf2, contentSize) {
+    return bufferEqual(buf1.slice(0, contentSize), buf2.slice(0, contentSize))
+}
+
+/**
+ * Compares two files by content.
+ */
+var compareSync = function (path1, stat1, path2, stat2, options) {
+    var fd1, fd2
+    if (stat1.size !== stat2.size) {
+        return false
+    }
+    var bufferPair = bufferPool.allocateBuffers()
+    try {
+        fd1 = fs.openSync(path1, 'r')
+        fd2 = fs.openSync(path2, 'r')
+        var buf1 = bufferPair.buf1
+        var buf2 = bufferPair.buf2
+        var progress = 0
+        while (true) {
+            var size1 = fs.readSync(fd1, buf1, 0, BUF_SIZE, null)
+            var size2 = fs.readSync(fd2, buf2, 0, BUF_SIZE, null)
+            if (size1 !== size2) {
+                return false
+            } else if (size1 === 0) {
+                // End of file reached
+                return true
+            } else if (!compareBuffers(buf1, buf2, size1)) {
+                return false
+            }
+        }
+    } finally {
+        closeFilesSync(fd1, fd2)
+        bufferPool.freeBuffers(bufferPair)
+    }
+}
+
+
+/**
+ * Compares two files by content
+ */
+var compareAsync = function (path1, stat1, path2, stat2, options) {
+    var fd1, fd2
+    var bufferPair
+    if (stat1.size !== stat2.size) {
+        return Promise.resolve(false)
+    }
+    return Promise.all([fdQueue.promises.open(path1, 'r'), fdQueue.promises.open(path2, 'r')])
+        .then(function (fds) {
+            bufferPair = bufferPool.allocateBuffers()
+            fd1 = fds[0]
+            fd2 = fds[1]
+            var buf1 = bufferPair.buf1
+            var buf2 = bufferPair.buf2
+            var progress = 0
+            var compareAsyncInternal = function () {
+                return Promise.all([
+                    fsPromise.read(fd1, buf1, 0, BUF_SIZE, null),
+                    fsPromise.read(fd2, buf2, 0, BUF_SIZE, null)
+                ]).then(function (bufferSizes) {
+                    var size1 = bufferSizes[0]
+                    var size2 = bufferSizes[1]
+                    if (size1 !== size2) {
+                        return false
+                    } else if (size1 === 0) {
+                        // End of file reached
+                        return true
+                    } else if (!compareBuffers(buf1, buf2, size1)) {
+                        return false
+                    } else {
+                        return compareAsyncInternal()
+                    }
+                })
+            }
+            return compareAsyncInternal()
+        })
+        .then(
+            // 'finally' polyfill for node 8 and below
+            function (res) {
+                return finalizeAsync(fd1, fd2, bufferPair).then(() => res)
+            },
+            function (err) {
+                return finalizeAsync(fd1, fd2, bufferPair).then(() => { throw err; })
+            }
+        )
+}
+
+function finalizeAsync(fd1, fd2, bufferPair) {
+    bufferPool.freeBuffers(bufferPair)
+    return closeFilesAsync(fd1, fd2, fdQueue)
+}
+
+module.exports = {
+    compareSync: compareSync,
+    compareAsync: compareAsync
+}
diff --git a/node_modules/dir-compare/src/fileCompareHandler/lineBasedFileCompare.js b/node_modules/dir-compare/src/fileCompareHandler/lineBasedFileCompare.js
new file mode 100644
index 0000000..c2de4b2
--- /dev/null
+++ b/node_modules/dir-compare/src/fileCompareHandler/lineBasedFileCompare.js
@@ -0,0 +1,196 @@
+/**
+ * Compare files line by line with options to ignore
+ * line endings and white space differencies.
+ */
+var fs = require('fs')
+var FileDescriptorQueue = require('../fs/FileDescriptorQueue')
+var closeFilesSync = require('./closeFile').closeFilesSync
+var closeFilesAsync = require('./closeFile').closeFilesAsync
+var fsPromise = require('../fs/fsPromise')
+var BufferPool = require('../fs/BufferPool')
+
+const LINE_TOKENIZER_REGEXP = /[^\n]+\n?|\n/g
+const TRIM_LINE_ENDING_REGEXP = /\r\n$/g
+const SPLIT_CONTENT_AND_LINE_ENDING_REGEXP = /([^\r\n]*)([\r\n]*)/
+const TRIM_WHITE_SPACES_REGEXP = /^[ \f\t\v\u00a0\u1680\u2000-\u200a\u2028\u2029\u202f\u205f\u3000\ufeff]+|[ \f\t\v\u00a0\u1680\u2000-\u200a\u2028\u2029\u202f\u205f\u3000\ufeff]+$/g
+
+var MAX_CONCURRENT_FILE_COMPARE = 8
+var BUF_SIZE = 100000
+var fdQueue = new FileDescriptorQueue(MAX_CONCURRENT_FILE_COMPARE * 2)
+var bufferPool = new BufferPool(BUF_SIZE, MAX_CONCURRENT_FILE_COMPARE);  // fdQueue guarantees there will be no more than MAX_CONCURRENT_FILE_COMPARE async processes accessing the buffers concurrently
+
+function compareSync(path1, stat1, path2, stat2, options) {
+    var fd1, fd2
+    var bufferPair = bufferPool.allocateBuffers()
+    var bufferSize = options.lineBasedHandlerBufferSize || BUF_SIZE
+    try {
+        fd1 = fs.openSync(path1, 'r')
+        fd2 = fs.openSync(path2, 'r')
+        var buf1 = bufferPair.buf1
+        var buf2 = bufferPair.buf2
+        var nextPosition1 = 0, nextPosition2 = 0
+        while (true) {
+            var lines1 = readLinesSync(fd1, buf1, bufferSize, nextPosition1)
+            var lines2 = readLinesSync(fd2, buf2, bufferSize, nextPosition2)
+            if (lines1.length === 0 && lines2.length === 0) {
+                // End of file reached
+                return true
+            }
+            var equalLines = compareLines(lines1, lines2, options)
+            if (equalLines === 0) {
+                return false
+            }
+            nextPosition1 += calculateSize(lines1, equalLines)
+            nextPosition2 += calculateSize(lines2, equalLines)
+        }
+    } finally {
+        closeFilesSync(fd1, fd2)
+        bufferPool.freeBuffers(bufferPair)
+    }
+}
+
+async function compareAsync(path1, stat1, path2, stat2, options) {
+    var fd1, fd2
+    var bufferSize = options.lineBasedHandlerBufferSize || BUF_SIZE
+    var bufferPair
+    try {
+        var fds = await Promise.all([fdQueue.promises.open(path1, 'r'), fdQueue.promises.open(path2, 'r')])
+        bufferPair = bufferPool.allocateBuffers()
+        fd1 = fds[0]
+        fd2 = fds[1]
+        var buf1 = bufferPair.buf1
+        var buf2 = bufferPair.buf2
+        var nextPosition1 = 0, nextPosition2 = 0
+        while (true) {
+            var lines1 = await readLinesAsync(fd1, buf1, bufferSize, nextPosition1)
+            var lines2 = await readLinesAsync(fd2, buf2, bufferSize, nextPosition2)
+            if (lines1.length === 0 && lines2.length === 0) {
+                // End of file reached
+                return true
+            }
+            var equalLines = compareLines(lines1, lines2, options)
+            if (equalLines === 0) {
+                return false
+            }
+            nextPosition1 += calculateSize(lines1, equalLines)
+            nextPosition2 += calculateSize(lines2, equalLines)
+        }
+    } finally {
+        bufferPool.freeBuffers(bufferPair)
+        await closeFilesAsync(fd1, fd2, fdQueue)
+    }
+}
+
+/**
+ * Read lines from file starting with nextPosition.
+ * Returns 0 lines if eof is reached, otherwise returns at least one complete line.
+ */
+function readLinesSync(fd, buf, bufferSize, nextPosition) {
+    var lines = []
+    var chunk = ""
+    while (true) {
+        var size = fs.readSync(fd, buf, 0, bufferSize, nextPosition)
+        if (size === 0) {
+            // end of file
+            normalizeLastFileLine(lines)
+            return lines
+        }
+        chunk += buf.toString('utf8', 0, size)
+        lines = chunk.match(LINE_TOKENIZER_REGEXP)
+        if (lines.length > 1) {
+            return removeLastIncompleteLine(lines)
+        }
+        nextPosition += size
+    }
+}
+
+/**
+ * Read lines from file starting with nextPosition.
+ * Returns 0 lines if eof is reached, otherwise returns at least one complete line.
+ */
+async function readLinesAsync(fd, buf, bufferSize, nextPosition) {
+    var lines = []
+    var chunk = ""
+    while (true) {
+        var size = await fsPromise.read(fd, buf, 0, bufferSize, nextPosition)
+        if (size === 0) {
+            // end of file
+            normalizeLastFileLine(lines)
+            return lines
+        }
+        chunk += buf.toString('utf8', 0, size)
+        lines = chunk.match(LINE_TOKENIZER_REGEXP)
+        if (lines.length > 1) {
+            return removeLastIncompleteLine(lines)
+        }
+        nextPosition += size
+    }
+}
+
+function removeLastIncompleteLine(lines) {
+    const lastLine = lines[lines.length - 1]
+    if (!lastLine.endsWith('\n')) {
+        return lines.slice(0, lines.length - 1)
+    }
+    return lines
+}
+
+function normalizeLastFileLine(lines) {
+    if (lines.length === 0) {
+        return
+    }
+    const lastLine = lines[lines.length - 1]
+    if (!lastLine.endsWith('\n')) {
+        lines[lines.length - 1] = lastLine + '\n'
+    }
+}
+
+function calculateSize(lines, numberOfLines) {
+    var size = 0
+    for (var i = 0; i < numberOfLines; i++) {
+        var line = lines[i]
+        size += line.length
+    }
+    return size
+}
+
+function compareLines(lines1, lines2, options) {
+    var equalLines = 0
+    var len = lines1.length < lines2.length ? lines1.length : lines2.length
+    for (var i = 0; i < len; i++) {
+        var line1 = lines1[i]
+        var line2 = lines2[i]
+        if (options.ignoreLineEnding) {
+            line1 = trimLineEnding(line1)
+            line2 = trimLineEnding(line2)
+        }
+        if (options.ignoreWhiteSpaces) {
+            line1 = trimSpaces(line1)
+            line2 = trimSpaces(line2)
+        }
+        if (line1 !== line2) {
+            return equalLines
+        }
+        equalLines++
+    }
+    return equalLines
+}
+
+// Trims string like '   abc   \n' into 'abc\n'
+function trimSpaces(s) {
+    var matchResult = s.match(SPLIT_CONTENT_AND_LINE_ENDING_REGEXP);
+    var content = matchResult[1]
+    var lineEnding = matchResult[2]
+    var trimmed = content.replace(TRIM_WHITE_SPACES_REGEXP, '')
+    return trimmed + lineEnding
+}
+
+// Trims string like 'abc\r\n' into 'abc\n'
+function trimLineEnding(s) {
+    return s.replace(TRIM_LINE_ENDING_REGEXP, '\n')
+}
+
+module.exports = {
+    compareSync: compareSync,
+    compareAsync: compareAsync
+}
diff --git a/node_modules/dir-compare/src/fs/BufferPool.js b/node_modules/dir-compare/src/fs/BufferPool.js
new file mode 100644
index 0000000..48febce
--- /dev/null
+++ b/node_modules/dir-compare/src/fs/BufferPool.js
@@ -0,0 +1,46 @@
+/**
+ * Collection of buffers to be shared between async processes.
+ * Avoids allocating buffers each time async process starts.
+ * bufSize - size of each buffer
+ * bufNo - number of buffers
+ * Caller has to make sure no more than bufNo async processes run simultaneously.
+ */
+function BufferPool(bufSize, bufNo) {
+    var bufferPool = []
+    for (var i = 0; i < bufNo; i++) {
+        bufferPool.push({
+            buf1: alloc(bufSize),
+            buf2: alloc(bufSize),
+            busy: false
+        })
+    }
+
+    var allocateBuffers = function () {
+        for (var j = 0; j < bufNo; j++) {
+            var bufferPair = bufferPool[j]
+            if (!bufferPair.busy) {
+                bufferPair.busy = true
+                return bufferPair
+            }
+        }
+        throw new Error('Async buffer limit reached')
+    }
+
+    return {
+        allocateBuffers: allocateBuffers,
+        freeBuffers: freeBuffers
+    }
+
+    function freeBuffers(bufferPair) {
+        bufferPair.busy = false
+    }
+}
+
+function alloc(bufSize) {
+    if (Buffer.alloc) {
+        return Buffer.alloc(bufSize)
+    }
+    return new Buffer(bufSize)
+}
+
+module.exports = BufferPool
diff --git a/node_modules/dir-compare/src/fs/FileDescriptorQueue.js b/node_modules/dir-compare/src/fs/FileDescriptorQueue.js
new file mode 100644
index 0000000..f017b20
--- /dev/null
+++ b/node_modules/dir-compare/src/fs/FileDescriptorQueue.js
@@ -0,0 +1,78 @@
+'use strict'
+
+var fs = require('fs')
+var Queue = require('./Queue')
+/**
+ * Limits the number of concurrent file handlers.
+ * Use it as a wrapper over fs.open() and fs.close().
+ * Example:
+ *  var fdQueue = new FileDescriptorQueue(8)
+ *  fdQueue.open(path, flags, (err, fd) =>{
+ *    ...
+ *    fdQueue.close(fd, (err) =>{
+ *      ...
+ *    })
+ *  })
+ *  As of node v7, calling fd.close without a callback is deprecated.
+ */
+var FileDescriptorQueue = function (maxFilesNo) {
+	var pendingJobs = new Queue()
+	var activeCount = 0
+
+	var open = function (path, flags, callback) {
+		pendingJobs.enqueue({
+			path: path,
+			flags: flags,
+			callback: callback
+		})
+		process()
+	}
+
+	var process = function () {
+		if (pendingJobs.getLength() > 0 && activeCount < maxFilesNo) {
+			var job = pendingJobs.dequeue()
+			activeCount++
+			fs.open(job.path, job.flags, job.callback)
+		}
+	}
+
+	var close = function (fd, callback) {
+		activeCount--
+		fs.close(fd, callback)
+		process()
+	}
+
+	var promises = {
+		open: function (path, flags) {
+			return new Promise(function (resolve, reject) {
+				open(path, flags, function (err, fd) {
+					if (err) {
+						reject(err)
+					} else {
+						resolve(fd)
+					}
+				})
+			})
+		},
+		
+		close: function (fd) {
+			return new Promise(function (resolve, reject) {
+				close(fd, function (err) {
+					if (err) {
+						reject(err)
+					} else {
+						resolve()
+					}
+				})
+			})
+		}
+	}
+
+	return {
+		open: open,
+		close: close,
+		promises: promises
+	}
+}
+
+module.exports = FileDescriptorQueue
diff --git a/node_modules/dir-compare/src/fs/Queue.js b/node_modules/dir-compare/src/fs/Queue.js
new file mode 100644
index 0000000..4d86dd5
--- /dev/null
+++ b/node_modules/dir-compare/src/fs/Queue.js
@@ -0,0 +1,63 @@
+/*
+
+Queue.js
+
+A function to represent a queue
+
+Created by Kate Morley - http://code.iamkate.com/ - and released under the terms
+of the CC0 1.0 Universal legal code:
+
+http://creativecommons.org/publicdomain/zero/1.0/legalcode
+
+*/
+
+var MAX_UNUSED_ARRAY_SIZE = 10000
+
+/* Creates a new queue. A queue is a first-in-first-out (FIFO) data structure -
+ * items are added to the end of the queue and removed from the front.
+ */
+function Queue() {
+
+  // initialise the queue and offset
+  var queue = []
+  var offset = 0
+
+  // Returns the length of the queue.
+  this.getLength = function () {
+    return (queue.length - offset)
+  }
+
+  /* Enqueues the specified item. The parameter is:
+   *
+   * item - the item to enqueue
+   */
+  this.enqueue = function (item) {
+    queue.push(item)
+  }
+
+  /* Dequeues an item and returns it. If the queue is empty, the value
+   * 'undefined' is returned.
+   */
+  this.dequeue = function () {
+
+    // if the queue is empty, return immediately
+    if (queue.length === 0) {
+      return undefined
+    }
+
+    // store the item at the front of the queue
+    var item = queue[offset]
+
+    // increment the offset and remove the free space if necessary
+    if (++offset > MAX_UNUSED_ARRAY_SIZE) {
+      queue = queue.slice(offset)
+      offset = 0
+    }
+
+    // return the dequeued item
+    return item
+
+  }
+}
+
+module.exports = Queue
diff --git a/node_modules/dir-compare/src/fs/fsPromise.js b/node_modules/dir-compare/src/fs/fsPromise.js
new file mode 100644
index 0000000..f6e3c5a
--- /dev/null
+++ b/node_modules/dir-compare/src/fs/fsPromise.js
@@ -0,0 +1,26 @@
+var fs = require('fs')
+
+module.exports = {
+    readdir: function (path) {
+        return new Promise(function (resolve, reject) {
+            fs.readdir(path, function (err, files) {
+                if (err) {
+                    reject(err)
+                } else {
+                    resolve(files)
+                }
+            })
+        })
+    },
+    read: function (fd, buffer, offset, length, position) {
+        return new Promise(function (resolve, reject) {
+            fs.read(fd, buffer, offset, length, position, function(err, bytesRead) {
+                if(err){
+                    reject(err)
+                } else {
+                    resolve(bytesRead)
+                }
+            })
+        })
+    },
+}
diff --git a/node_modules/dir-compare/src/index.d.ts b/node_modules/dir-compare/src/index.d.ts
new file mode 100644
index 0000000..fc84980
--- /dev/null
+++ b/node_modules/dir-compare/src/index.d.ts
@@ -0,0 +1,476 @@
+/// <reference types="node" />
+
+import * as fs from "fs"
+
+/**
+ * Synchronously compares given paths.
+ * @param path1 Left file or directory to be compared.
+ * @param path2 Right file or directory to be compared.
+ * @param options Comparison options.
+ */
+export function compareSync(path1: string, path2: string, options?: Options): Result
+
+/**
+ * Asynchronously compares given paths.
+ * @param path1 Left file or directory to be compared.
+ * @param path2 Right file or directory to be compared.
+ * @param options Comparison options.
+ */
+export function compare(path1: string, path2: string, options?: Options): Promise<Result>
+
+/**
+ * Comparison options.
+ */
+export interface Options {
+    /**
+     * Properties to be used in various extension points ie. result builder.
+     */
+    [key: string]: any
+
+    /**
+     * Compares files by size. Defaults to 'false'.
+     */
+    compareSize?: boolean
+
+    /**
+     *  Compares files by date of modification (stat.mtime). Defaults to 'false'.
+     */
+    compareDate?: boolean
+
+    /**
+     * Two files are considered to have the same date if the difference between their modification dates fits within date tolerance. Defaults to 1000 ms.
+     */
+    dateTolerance?: number
+
+    /**
+     * Compares files by content. Defaults to 'false'.
+     */
+    compareContent?: boolean
+
+    /**
+     * Compares entries by symlink. Defaults to 'false'.
+     */
+    compareSymlink?: boolean
+
+    /**
+     * Skips sub directories. Defaults to 'false'.
+     */
+    skipSubdirs?: boolean
+
+    /**
+     * Ignore symbolic links. Defaults to 'false'.
+     */
+    skipSymlinks?: boolean
+
+    /**
+     * Ignores case when comparing names. Defaults to 'false'.
+     */
+    ignoreCase?: boolean
+
+    /**
+     * Toggles presence of diffSet in output. If true, only statistics are provided. Use this when comparing large number of files to avoid out of memory situations. Defaults to 'false'.
+     */
+    noDiffSet?: boolean
+
+    /**
+     * File name filter. Comma separated minimatch patterns. See [Glob patterns](https://github.com/gliviu/dir-compare#glob-patterns).
+     */
+    includeFilter?: string
+
+    /**
+     * File/directory name exclude filter. Comma separated minimatch patterns. See [Glob patterns](https://github.com/gliviu/dir-compare#glob-patterns)
+     */
+    excludeFilter?: string
+
+    /**
+     * Callback for constructing result. Called for each compared entry pair.
+     * 
+     * Updates 'statistics' and 'diffSet'.
+     * 
+     * See [Custom result builder](https://github.com/gliviu/dir-compare#custom-result-builder).
+     */
+    resultBuilder?: ResultBuilder
+
+    /**
+     * File comparison handler. See [Custom file comparators](https://github.com/gliviu/dir-compare#custom-file-content-comparators).
+     */
+    compareFileSync?: CompareFileSync
+
+    /**
+     * File comparison handler. See [Custom file comparators](https://github.com/gliviu/dir-compare#custom-file-content-comparators).
+     */
+    compareFileAsync?: CompareFileAsync
+
+    /**
+     * Entry name comparison handler. See [Custom name comparators](https://github.com/gliviu/dir-compare#custom-name-comparators).
+     */
+    compareNameHandler?: CompareNameHandler
+}
+
+/**
+ * Callback for constructing result. Called for each compared entry pair.
+ * 
+ * Updates 'statistics' and 'diffSet'.
+ */
+export type ResultBuilder =
+    /**
+     * @param entry1 Left entry.
+     * @param entry2 Right entry.
+     * @param state See [[DifferenceState]].
+     * @param level Depth level relative to root dir.
+     * @param relativePath Path relative to root dir.
+     * @param statistics Statistics to be updated.
+     * @param diffSet Status per each entry to be appended.
+     * Do not append if [[Options.noDiffSet]] is false.
+     * @param reason See [[Reason]]. Not available if entries are equal.
+     */
+    (
+        entry1: Entry | undefined,
+        entry2: Entry | undefined,
+        state: DifferenceState,
+        level: number,
+        relativePath: string,
+        options: Options,
+        statistics: Statistics,
+        diffSet: Array<Difference> | undefined,
+        reason: Reason | undefined
+    ) => void
+
+export interface Entry {
+    name: string
+    absolutePath: string
+    path: string
+    stat: fs.Stats
+    lstat: fs.Stats
+    symlink: boolean
+}
+
+/**
+ * Comparison result.
+ */
+export interface Result extends Statistics {
+    /**
+     * List of changes (present if [[Options.noDiffSet]] is false).
+     */
+    diffSet?: Array<Difference>
+}
+
+export interface Statistics {
+    /**
+     * Any property is allowed if default result builder is not used.
+     */
+    [key: string]: any
+
+    /**
+     * True if directories are identical.
+     */
+    same: boolean
+
+    /**
+     * Number of distinct entries.
+     */
+    distinct: number
+
+    /**
+     * Number of equal entries.
+     */
+    equal: number
+
+    /**
+     * Number of entries only in path1.
+     */
+    left: number
+
+    /**
+     * Number of entries only in path2.
+     */
+    right: number
+
+    /**
+     * Total number of differences (distinct+left+right).
+     */
+    differences: number
+
+    /**
+     * Total number of entries (differences+equal).
+     */
+    total: number
+
+    /**
+     * Number of distinct files.
+     */
+    distinctFiles: number
+
+    /**
+     * Number of equal files.
+     */
+    equalFiles: number
+
+    /**
+     * Number of files only in path1.
+     */
+    leftFiles: number
+
+    /**
+     * Number of files only in path2
+     */
+    rightFiles: number
+
+    /**
+     * Total number of different files (distinctFiles+leftFiles+rightFiles).
+     */
+    differencesFiles: number
+
+    /**
+     * Total number of files (differencesFiles+equalFiles).
+     */
+    totalFiles: number
+
+    /**
+     * Number of distinct directories.
+     */
+    distinctDirs: number
+
+    /**
+     * Number of equal directories.
+     */
+    equalDirs: number
+
+    /**
+     * Number of directories only in path1.
+     */
+    leftDirs: number
+
+    /**
+     * Number of directories only in path2.
+     */
+    rightDirs: number
+
+    /**
+     * Total number of different directories (distinctDirs+leftDirs+rightDirs).
+     */
+    differencesDirs: number
+
+    /**
+     * Total number of directories (differencesDirs+equalDirs).
+     */
+    totalDirs: number
+
+    /**
+     * Stats about broken links.
+     */
+    brokenLinks: BrokenLinksStatistics
+
+    /**
+     * Statistics available if 'compareSymlink' options is used.
+     */
+    symlinks?: SymlinkStatistics
+}
+
+export interface BrokenLinksStatistics {
+    /**
+     * Number of broken links only in path1
+     */
+    leftBrokenLinks: number
+
+    /**
+     * Number of broken links only in path2
+     */
+    rightBrokenLinks: number
+
+    /**
+     * Number of broken links with same name appearing in both path1 and path2  (leftBrokenLinks+rightBrokenLinks+distinctBrokenLinks)
+     */
+    distinctBrokenLinks: number
+
+    /**
+     * Total number of broken links
+     */
+    totalBrokenLinks: number
+
+}
+
+export interface SymlinkStatistics {
+    /**
+     * Number of distinct links.
+     */
+    distinctSymlinks: number
+
+    /**
+     * Number of equal links.
+     */
+    equalSymlinks: number
+
+    /**
+     * Number of links only in path1.
+     */
+    leftSymlinks: number
+
+    /**
+     * Number of links only in path2
+     */
+    rightSymlinks: number
+
+    /**
+     * Total number of different links (distinctSymlinks+leftSymlinks+rightSymlinks).
+     */
+    differencesSymlinks: number
+
+    /**
+     * Total number of links (differencesSymlinks+equalSymlinks).
+     */
+    totalSymlinks: number
+
+}
+
+/**
+ * State of left/right entries relative to each other.
+ */
+export type DifferenceState = "equal" | "left" | "right" | "distinct"
+
+/**
+ * Type of entry.
+ */
+export type DifferenceType = "missing" | "file" | "directory" | "broken-link"
+
+/**
+ * Provides reason when two identically named entries are distinct.
+ */
+export type Reason = "different-size" | "different-date" | "different-content" | "broken-link" | 'different-symlink'
+
+export interface Difference {
+    /**
+     * Any property is allowed if default result builder is not used.
+     */
+    [key: string]: any
+
+    /**
+     * Path not including file/directory name; can be relative or absolute depending on call to compare().
+     */
+    path1?: string
+
+    /**
+     * Path not including file/directory name; can be relative or absolute depending on call to compare().
+     */
+    path2?: string
+
+    /**
+     * Path relative to root dir.
+     */
+    relativePath: string
+
+    /**
+     * Left file/directory name.
+     */
+    name1?: string
+
+    /**
+     * Right file/directory name.
+     */
+    name2?: string
+
+    /**
+     * See [[DifferenceState]]
+     */
+    state: DifferenceState
+
+    /**
+     * Type of left entry.
+     */
+    type1: DifferenceType
+
+    /**
+     * Type of right entry.
+     */
+    type2: DifferenceType
+
+    /**
+     * Left file size.
+     */
+    size1?: number
+
+    /**
+     * Right file size.
+     */
+    size2?: number
+
+    /**
+     * Left entry modification date (stat.mtime).
+     */
+    date1?: number
+
+    /**
+     * Right entry modification date (stat.mtime).
+     */
+    date2?: number
+
+    /**
+     * Depth level relative to root dir.
+     */
+    level: number
+
+    /**
+     * See [[Reason]].
+     * Not available if entries are equal.
+     */
+    reason?: Reason
+}
+
+/**
+ * Synchronous file content comparison handler.
+ */
+export type CompareFileSync = (
+    path1: string,
+    stat1: fs.Stats,
+    path2: string,
+    stat2: fs.Stats,
+    options: Options
+) => boolean
+
+/**
+ * Asynchronous file content comparison handler.
+ */
+export type CompareFileAsync = (
+    path1: string,
+    stat1: fs.Stats,
+    path2: string,
+    stat2: fs.Stats,
+    options: Options
+) => Promise<boolean>
+
+export interface CompareFileHandler {
+    compareSync: CompareFileSync,
+    compareAsync: CompareFileAsync
+}
+
+/**
+ * Available file content comparison handlers.
+ * These handlers are used when [[Options.compareContent]] is set.
+ */
+export const fileCompareHandlers: {
+    /**
+     * Default file content comparison handlers, used if [[Options.compareFileAsync]] or [[Options.compareFileSync]] are not specified.
+     * 
+     * Performs binary comparison.
+     */
+    defaultFileCompare: CompareFileHandler,
+    /**
+     * Compares files line by line.
+     * 
+     * Options:
+     * * ignoreLineEnding - tru/false (default: false)
+     * * ignoreWhiteSpaces - tru/false (default: false)
+     */
+    lineBasedFileCompare: CompareFileHandler
+}
+
+/**
+ * Compares the names of two entries.
+ * The comparison should be dependent on received options (ie. case sensitive, ...).
+ * Returns 0 if names are identical, -1 if name1<name2, 1 if name1>name2.
+ */
+export type CompareNameHandler = (
+    name1: string,
+    name2: string,
+    options: Options
+) => 0 | 1 | -1
diff --git a/node_modules/dir-compare/src/index.js b/node_modules/dir-compare/src/index.js
new file mode 100644
index 0000000..fb1b6b8
--- /dev/null
+++ b/node_modules/dir-compare/src/index.js
@@ -0,0 +1,204 @@
+var util = require('util')
+var pathUtils = require('path')
+var fs = require('fs')
+var compareSyncInternal = require('./compareSync')
+var compareAsyncInternal = require('./compareAsync')
+var defaultResultBuilderCallback = require('./resultBuilder/defaultResultBuilderCallback')
+var defaultFileCompare = require('./fileCompareHandler/defaultFileCompare')
+var lineBasedFileCompare = require('./fileCompareHandler/lineBasedFileCompare')
+var defaultNameCompare = require('./nameCompare/defaultNameCompare')
+var entryBuilder = require('./entry/entryBuilder')
+var statsLifecycle = require('./statistics/statisticsLifecycle')
+var loopDetector = require('./symlink/loopDetector')
+
+var ROOT_PATH = pathUtils.sep
+
+var compareSync = function (path1, path2, options) {
+    'use strict'
+    // realpathSync() is necessary for loop detection to work properly
+    var absolutePath1 = pathUtils.normalize(pathUtils.resolve(fs.realpathSync(path1)))
+    var absolutePath2 = pathUtils.normalize(pathUtils.resolve(fs.realpathSync(path2)))
+    var diffSet
+    options = prepareOptions(options)
+    if (!options.noDiffSet) {
+        diffSet = []
+    }
+    var statistics = statsLifecycle.initStats(options)
+    compareSyncInternal(
+        entryBuilder.buildEntry(absolutePath1, path1, pathUtils.basename(absolutePath1)),
+        entryBuilder.buildEntry(absolutePath2, path2, pathUtils.basename(absolutePath2)),
+        0, ROOT_PATH, options, statistics, diffSet, loopDetector.initSymlinkCache())
+    statsLifecycle.completeStatistics(statistics, options)
+    statistics.diffSet = diffSet
+
+    return statistics
+}
+
+var wrapper = {
+    realPath: function(path, options) {
+        return new Promise(function (resolve, reject) {
+            fs.realpath(path, options, function(err, resolvedPath) {
+                if(err){
+                    reject(err)
+                } else {
+                    resolve(resolvedPath)
+                }
+            })
+        })
+    }
+}
+
+var compareAsync = function (path1, path2, options) {
+    'use strict'
+    var absolutePath1, absolutePath2
+    return Promise.resolve()
+        .then(function () {
+            return Promise.all([wrapper.realPath(path1), wrapper.realPath(path2)])
+        })
+        .then(function (realPaths) {
+            var realPath1 = realPaths[0]
+            var realPath2 = realPaths[1]
+            // realpath() is necessary for loop detection to work properly
+            absolutePath1 = pathUtils.normalize(pathUtils.resolve(realPath1))
+            absolutePath2 = pathUtils.normalize(pathUtils.resolve(realPath2))
+        })
+        .then(function () {
+            options = prepareOptions(options)
+            var asyncDiffSet
+            if (!options.noDiffSet) {
+                asyncDiffSet = []
+            }
+            var statistics = statsLifecycle.initStats(options)
+            return compareAsyncInternal(
+                entryBuilder.buildEntry(absolutePath1, path1, pathUtils.basename(path1)),
+                entryBuilder.buildEntry(absolutePath2, path2, pathUtils.basename(path2)),
+                0, ROOT_PATH, options, statistics, asyncDiffSet, loopDetector.initSymlinkCache()).then(
+                    function () {
+                        statsLifecycle.completeStatistics(statistics, options)
+                        if (!options.noDiffSet) {
+                            var diffSet = []
+                            rebuildAsyncDiffSet(statistics, asyncDiffSet, diffSet)
+                            statistics.diffSet = diffSet
+                        }
+                        return statistics
+                    })
+        })
+}
+
+var prepareOptions = function (options) {
+    options = options || {}
+    var clone = JSON.parse(JSON.stringify(options))
+    clone.resultBuilder = options.resultBuilder
+    clone.compareFileSync = options.compareFileSync
+    clone.compareFileAsync = options.compareFileAsync
+    clone.compareNameHandler = options.compareNameHandler
+    if (!clone.resultBuilder) {
+        clone.resultBuilder = defaultResultBuilderCallback
+    }
+    if (!clone.compareFileSync) {
+        clone.compareFileSync = defaultFileCompare.compareSync
+    }
+    if (!clone.compareFileAsync) {
+        clone.compareFileAsync = defaultFileCompare.compareAsync
+    }
+    if(!clone.compareNameHandler) {
+        clone.compareNameHandler = defaultNameCompare
+    }
+    clone.dateTolerance = clone.dateTolerance || 1000
+    clone.dateTolerance = Number(clone.dateTolerance)
+    if (isNaN(clone.dateTolerance)) {
+        throw new Error('Date tolerance is not a number')
+    }
+    return clone
+}
+
+
+// Async diffsets are kept into recursive structures.
+// This method transforms them into one dimensional arrays.
+var rebuildAsyncDiffSet = function (statistics, asyncDiffSet, diffSet) {
+    asyncDiffSet.forEach(function (rawDiff) {
+        if (!Array.isArray(rawDiff)) {
+            diffSet.push(rawDiff)
+        } else {
+            rebuildAsyncDiffSet(statistics, rawDiff, diffSet)
+        }
+    })
+}
+
+
+/**
+ * Options:
+ * compareSize: true/false - Compares files by size. Defaults to 'false'.
+ * compareDate: true/false - Compares files by date of modification (stat.mtime). Defaults to 'false'.
+ * dateTolerance: milliseconds - Two files are considered to have the same date if the difference between their modification dates fits within date tolerance. Defaults to 1000 ms.
+ * compareContent: true/false - Compares files by content. Defaults to 'false'.
+ * compareSymlink: true/false - Compares entries by symlink. Defaults to 'false'.
+ * skipSubdirs: true/false - Skips sub directories. Defaults to 'false'.
+ * skipSymlinks: true/false - Skips symbolic links. Defaults to 'false'.
+ * ignoreCase: true/false - Ignores case when comparing names. Defaults to 'false'.
+ * noDiffSet: true/false - Toggles presence of diffSet in output. If true, only statistics are provided. Use this when comparing large number of files to avoid out of memory situations. Defaults to 'false'.
+ * includeFilter: File name filter. Comma separated [minimatch](https://www.npmjs.com/package/minimatch) patterns.
+ * excludeFilter: File/directory name exclude filter. Comma separated [minimatch](https://www.npmjs.com/package/minimatch) patterns.
+ * resultBuilder: Callback for constructing result.
+ * 	function (entry1, entry2, state, level, relativePath, options, statistics, diffSet). Called for each compared entry pair. Updates 'statistics' and 'diffSet'.
+ * compareFileSync, compareFileAsync: Callbacks for file comparison. 
+ * compareNameHandler: Callback for name comparison
+ *
+ * Result:
+ * same: true if directories are identical
+ * distinct: number of distinct entries
+ * equal: number of equal entries
+ * left: number of entries only in path1
+ * right: number of entries only in path2
+ * differences: total number of differences (distinct+left+right)
+ * total: total number of entries (differences+equal)
+ * distinctFiles: number of distinct files
+ * equalFiles: number of equal files
+ * leftFiles: number of files only in path1
+ * rightFiles: number of files only in path2
+ * differencesFiles: total number of different files (distinctFiles+leftFiles+rightFiles)
+ * totalFiles: total number of files (differencesFiles+equalFiles)
+ * distinctDirs: number of distinct directories
+ * equalDirs: number of equal directories
+ * leftDirs: number of directories only in path1
+ * rightDirs: number of directories only in path2
+ * differencesDirs: total number of different directories (distinctDirs+leftDirs+rightDirs)
+ * totalDirs: total number of directories (differencesDirs+equalDirs)
+ * brokenLinks:
+ *     leftBrokenLinks: number of broken links only in path1
+ *     rightBrokenLinks: number of broken links only in path2
+ *     distinctBrokenLinks: number of broken links with same name appearing in both path1 and path2
+ *     totalBrokenLinks: total number of broken links (leftBrokenLinks+rightBrokenLinks+distinctBrokenLinks)
+ * symlinks: Statistics available if 'compareSymlink' options is used
+ *     distinctSymlinks: number of distinct links
+ *     equalSymlinks: number of equal links
+ *     leftSymlinks: number of links only in path1
+ *     rightSymlinks: number of links only in path2
+ *     differencesSymlinks: total number of different links (distinctSymlinks+leftSymlinks+rightSymlinks)
+ *     totalSymlinks: total number of links (differencesSymlinks+equalSymlinks)
+ * diffSet - List of changes (present if Options.noDiffSet is false)
+ *     path1: absolute path not including file/directory name,
+ *     path2: absolute path not including file/directory name,
+ *     relativePath: common path relative to root,
+ *     name1: file/directory name
+ *     name2: file/directory name
+ *     state: one of equal, left, right, distinct,
+ *     type1: one of missing, file, directory, broken-link
+ *     type2: one of missing, file, directory, broken-link
+ *     size1: file size
+ *     size2: file size
+ *     date1: modification date (stat.mtime)
+ *     date2: modification date (stat.mtime)
+ *     level: depth
+ *     reason: Provides reason when two identically named entries are distinct
+ *             Not available if entries are equal
+ *             One of "different-size", "different-date", "different-content", "broken-link", "different-symlink"
+ */
+module.exports = {
+    compareSync: compareSync,
+    compare: compareAsync,
+    fileCompareHandlers: {
+        defaultFileCompare: defaultFileCompare,
+        lineBasedFileCompare: lineBasedFileCompare
+    }
+}
diff --git a/node_modules/dir-compare/src/nameCompare/defaultNameCompare.js b/node_modules/dir-compare/src/nameCompare/defaultNameCompare.js
new file mode 100644
index 0000000..4ed2e99
--- /dev/null
+++ b/node_modules/dir-compare/src/nameCompare/defaultNameCompare.js
@@ -0,0 +1,12 @@
+
+module.exports = function compareName(name1, name2, options) {
+	if (options.ignoreCase) {
+		name1 = name1.toLowerCase()
+		name2 = name2.toLowerCase()
+	}
+	return strcmp(name1, name2)
+}
+
+function strcmp(str1, str2) {
+	return ((str1 === str2) ? 0 : ((str1 > str2) ? 1 : -1))
+}
diff --git a/node_modules/dir-compare/src/resultBuilder/defaultResultBuilderCallback.js b/node_modules/dir-compare/src/resultBuilder/defaultResultBuilderCallback.js
new file mode 100644
index 0000000..224b927
--- /dev/null
+++ b/node_modules/dir-compare/src/resultBuilder/defaultResultBuilderCallback.js
@@ -0,0 +1,27 @@
+'use strict'
+
+var pathUtils = require('path')
+var common = require('../entry/entryBuilder')
+var entryType = require('../entry/entryType')
+
+module.exports = function (entry1, entry2, state, level, relativePath, options, statistics, diffSet, reason) {
+    if (options.noDiffSet) {
+        return
+    }
+    diffSet.push({
+        path1: entry1 ? pathUtils.dirname(entry1.path) : undefined,
+        path2: entry2 ? pathUtils.dirname(entry2.path) : undefined,
+        relativePath: relativePath,
+        name1: entry1 ? entry1.name : undefined,
+        name2: entry2 ? entry2.name : undefined,
+        state: state,
+        type1: entryType.getType(entry1),
+        type2: entryType.getType(entry2),
+        level: level,
+        size1: entry1 ? entry1.stat.size : undefined,
+        size2: entry2 ? entry2.stat.size : undefined,
+        date1: entry1 ? entry1.stat.mtime : undefined,
+        date2: entry2 ? entry2.stat.mtime : undefined,
+        reason: reason
+    })
+}
diff --git a/node_modules/dir-compare/src/statistics/statisticsLifecycle.js b/node_modules/dir-compare/src/statistics/statisticsLifecycle.js
new file mode 100644
index 0000000..549ec5e
--- /dev/null
+++ b/node_modules/dir-compare/src/statistics/statisticsLifecycle.js
@@ -0,0 +1,59 @@
+/**
+ * Controls creation/completion of global statistics object.
+ */
+module.exports = {
+    initStats(options) {
+        var symlinkStatistics = undefined
+        if (options.compareSymlink) {
+            symlinkStatistics = {
+                distinctSymlinks: 0,
+                equalSymlinks: 0,
+                leftSymlinks: 0,
+                rightSymlinks: 0,
+                differencesSymlinks: 0,
+                totalSymlinks: 0,
+            }
+        }
+        var brokenLinksStatistics = {
+            leftBrokenLinks: 0,
+            rightBrokenLinks: 0,
+            distinctBrokenLinks: 0,
+        }
+        return {
+            distinct: 0,
+            equal: 0,
+            left: 0,
+            right: 0,
+            distinctFiles: 0,
+            equalFiles: 0,
+            leftFiles: 0,
+            rightFiles: 0,
+            distinctDirs: 0,
+            equalDirs: 0,
+            leftDirs: 0,
+            rightDirs: 0,
+            brokenLinks: brokenLinksStatistics,
+            symlinks: symlinkStatistics,
+            same: undefined
+        }
+    },
+
+    completeStatistics(statistics, options) {
+        statistics.differences = statistics.distinct + statistics.left + statistics.right
+        statistics.differencesFiles = statistics.distinctFiles + statistics.leftFiles + statistics.rightFiles
+        statistics.differencesDirs = statistics.distinctDirs + statistics.leftDirs + statistics.rightDirs
+        statistics.total = statistics.equal + statistics.differences
+        statistics.totalFiles = statistics.equalFiles + statistics.differencesFiles
+        statistics.totalDirs = statistics.equalDirs + statistics.differencesDirs
+        var brokenLInksStats = statistics.brokenLinks
+        brokenLInksStats.totalBrokenLinks = brokenLInksStats.leftBrokenLinks + brokenLInksStats.rightBrokenLinks + brokenLInksStats.distinctBrokenLinks
+        statistics.same = statistics.differences ? false : true
+
+        if (options.compareSymlink) {
+            statistics.symlinks.differencesSymlinks = statistics.symlinks.distinctSymlinks +
+                statistics.symlinks.leftSymlinks + statistics.symlinks.rightSymlinks
+            statistics.symlinks.totalSymlinks = statistics.symlinks.differencesSymlinks + statistics.symlinks.equalSymlinks
+        }
+    }
+
+}
\ No newline at end of file
diff --git a/node_modules/dir-compare/src/statistics/statisticsUpdate.js b/node_modules/dir-compare/src/statistics/statisticsUpdate.js
new file mode 100644
index 0000000..a1b2312
--- /dev/null
+++ b/node_modules/dir-compare/src/statistics/statisticsUpdate.js
@@ -0,0 +1,62 @@
+/**
+ * Calculates comparison statistics.
+ */
+module.exports = {
+    updateStatisticsBoth: function (entry1, entry2, same, reason, type, statistics, options) {
+        same ? statistics.equal++ : statistics.distinct++
+        if (type === 'file') {
+            same ? statistics.equalFiles++ : statistics.distinctFiles++
+        } else if (type === 'directory') {
+            same ? statistics.equalDirs++ : statistics.distinctDirs++
+        } else if (type === 'broken-link') {
+            statistics.brokenLinks.distinctBrokenLinks++
+        } else {
+            throw new Error('Unexpected type ' + type)
+        }
+
+        var isSymlink1 = entry1 ? entry1.isSymlink : false
+        var isSymlink2 = entry2 ? entry2.isSymlink : false
+        var isSymlink = isSymlink1 || isSymlink2
+        if (options.compareSymlink && isSymlink) {
+            var symlinks = statistics.symlinks
+            if (reason === 'different-symlink') {
+                symlinks.distinctSymlinks++
+            } else {
+                symlinks.equalSymlinks++
+            }
+        }
+
+    },
+    updateStatisticsLeft: function (entry1, type, statistics, options) {
+        statistics.left++
+        if (type === 'file') {
+            statistics.leftFiles++
+        } else if (type === 'directory') {
+            statistics.leftDirs++
+        } else if (type === 'broken-link') {
+            statistics.brokenLinks.leftBrokenLinks++
+        } else {
+            throw new Error('Unexpected type ' + type)
+        }
+
+        if (options.compareSymlink && entry1.isSymlink) {
+            statistics.symlinks.leftSymlinks++
+        }
+    },
+    updateStatisticsRight: function (entry2, type, statistics, options) {
+        statistics.right++
+        if (type === 'file') {
+            statistics.rightFiles++
+        } else if (type === 'directory') {
+            statistics.rightDirs++
+        } else if (type === 'broken-link') {
+            statistics.brokenLinks.rightBrokenLinks++
+        } else {
+            throw new Error('Unexpected type ' + type)
+        }
+
+        if (options.compareSymlink && entry2.isSymlink) {
+            statistics.symlinks.rightSymlinks++
+        }
+    },
+}
\ No newline at end of file
diff --git a/node_modules/dir-compare/src/symlink/loopDetector.js b/node_modules/dir-compare/src/symlink/loopDetector.js
new file mode 100644
index 0000000..0376ebb
--- /dev/null
+++ b/node_modules/dir-compare/src/symlink/loopDetector.js
@@ -0,0 +1,51 @@
+var fs = require('fs')
+
+/**
+ * Provides symlink loop detection to directory traversal algorithm.
+ */
+module.exports = {
+	detectLoop: function (entry, symlinkCache) {
+		if (entry && entry.isSymlink) {
+			var realPath = fs.realpathSync(entry.absolutePath)
+			if (symlinkCache[realPath]) {
+				return true
+			}
+		}
+		return false
+	},
+
+	initSymlinkCache: function() {
+		return {
+			dir1: {},
+			dir2: {}
+		}
+	},
+
+	updateSymlinkCache: function(symlinkCache, rootEntry1, rootEntry2, loopDetected1, loopDetected2) {
+		var symlinkCachePath1, symlinkCachePath2
+		if (rootEntry1 && !loopDetected1) {
+			symlinkCachePath1 = rootEntry1.isSymlink ? fs.realpathSync(rootEntry1.absolutePath) : rootEntry1.absolutePath
+			symlinkCache.dir1[symlinkCachePath1] = true
+		}
+		if (rootEntry2 && !loopDetected2) {
+			symlinkCachePath2 = rootEntry2.isSymlink ? fs.realpathSync(rootEntry2.absolutePath) : rootEntry2.absolutePath
+			symlinkCache.dir2[symlinkCachePath2] = true
+		}
+	},
+
+	cloneSymlinkCache: function (symlinkCache) {
+		return {
+			dir1: shallowClone(symlinkCache.dir1),
+			dir2: shallowClone(symlinkCache.dir2)
+		}
+	},
+}
+
+function shallowClone(obj) {
+	var cloned = {}
+	Object.keys(obj).forEach(function (key) {
+		cloned[key] = obj[key]
+	})
+	return cloned
+}
+