Path: extend path for Node installed on /usr/local/bin

Fixes #17

Blame on me, I got this from [StackOverflow](http://stackoverflow.com/questions/8574919/sublime-text-2-custom-path-and-pythonpath). I'm really not experienced with Python and I can't say this is ok or shit.

Also, calling a friend for a third part opinion: @henriquebastos (sorry, I don't know anyone else better to help me here).