Perf: remove regenerate dependency

Hi,

Having big performance issues by only creating a tiny gulp task, I decided to investigate.

My example:
```js
var gulp = require('gulp');
var jscs = require('gulp-jscs');

gulp.task('cs', function() {
  return gulp.src('index.js')
    .pipe(jscs())
  ;
});
```

The content of index.js (yes, it is a very big file):
```js
angular.module('my-app', [])
  .factory('$i18nCache', function($cacheFactory) {
    return $cacheFactory('i18n');
  })
;
```
… so nothing out of the ordinary.

I time the execution. The result: **3s on my desktop machine**… WTF?! O_O

So I profile the process to see what is going on. I stumble on this:

```
 [JavaScript]:
   ticks  total  nonlib   name
   1056   26.1%   58.3%  LazyCompile: dataAdd /home/etienne/work/glou/example/angular.app/node_modules/gulp-jscs/node_modules/jscs/node_modules/regenerate/regenerate.js:222
    262    6.5%   14.5%  Stub: KeyedLoadElementStub {1}
     92    2.3%    5.1%  RegExp: ^(\\/?|)([\\s\\S]*?)((?:\\.{1\,2}|[^\\/]+?|)(\\.[^.\\/]*|))(?:[\\/]*)$
     60    1.5%    3.3%  KeyedLoadIC: args_count: 0 {1}
     16    0.4%    0.9%  LazyCompile: Join native array.js:119
     13    0.3%    0.7%  LazyCompile: extend.add /home/etienne/work/glou/example/angular.app/node_modules/gulp-jscs/node_modules/jscs/node_modules/regenerate/regenerate.js:947
     12    0.3%    0.7%  Builtin: A builtin from the snapshot {1}
     10    0.2%    0.6%  Stub: CEntryStub
     10    0.2%    0.6%  RegExp: ^(\\/?|)([\\s\\S]*?)((?:\\.{1\,2}|[^\\/]+?|)(\\.[^.\\/]*|))(?:[\\/]*)$ {1}
      6    0.1%    0.3%  Stub: SubStringStub
      6    0.1%    0.3%  Stub: CompareICStub
```
etc…

**1056 ticks on the library: `regenerate`!
58.3% of total user execution!**

As I look into the only 2 rules using `regenerate`, maybe my understanding is wrong, but it seems that `regenerate` is unnecessary as the proper regexp are shipped along with `unicode`…

The fun thing? This tiny little patch improves the overall performance of JSCS **by a factor > 200** :)