Merge with NicoSantangelo/SublimeLinter-contrib-flow

Hello! sorry for the delay!

I finally got around [merging](https://github.com/NicoSantangelo/SublimeLinter-contrib-flow/issues/2) the packages. I've splitted the commits in the different features so you can review them separately (and if you don't like any of them, rebase and remove them).

Try it out if you like! if anything looks suspicious let me know, I'm happy to help.

Thanks! 
I'm having a little issue with this one, testing on a file of my own it doesn't lint well when I have something like this:

````
/Users/nicosantangelo/Work/MyWay/myWay/www/js/models.js:247:13,28:
non-string literal property keys not supported

/Users/nicosantangelo/Work/MyWay/myWay/www/js/models.js:248:13,23:
non-string literal property keys not supported

/Users/nicosantangelo/Work/MyWay/myWay/www/js/models.js:249:13,23:
non-string literal property keys not supported

/Users/nicosantangelo/Work/MyWay/myWay/www/js/models.js:250:13,24:
non-string literal property keys not supported

/Users/nicosantangelo/Work/MyWay/myWay/www/js/models.js:251:13,24:
non-string literal property keys not supported
`````

It goes from:

![screen shot 2014-11-28 at 3 30 10 pm](https://cloud.githubusercontent.com/assets/692077/5231247/816b864e-7713-11e4-8b5e-0915f334da87.png)


to:

![screen shot 2014-11-28 at 3 30 00 pm](https://cloud.githubusercontent.com/assets/692077/5231245/7d266630-7713-11e4-8579-d8bf70dbfee9.png)