adding ignore patterns

Hello @sboora, @chaosgame, @sugunasubra, 

Please review the following commits I made in branch 'giannic-output'.

da63caf79cefc393c51ba0d8b4b2da167b5b51e4 (2014-06-11 14:47:31 -0700)
adding ignore patterns

R=@sboora
R=@chaosgame
R=@sugunasubra
You don't actually need these variables, do you? I'd rather do:

```javascript
var IGNORE_PATTERNS = RegExp([
    '.+\.prototype\..+', // function headers
    ...
].join('|'))
```

Also note the indentation. We would like to have all our open (and closed) source projects follow the same style convention.