Added support for HAML
Added /vendor to .gitignore
Added coffee script support
Added SASS support
Fix: Ignore /vendor/ruby instead of /vendor

Bower handles /vendor/assets if we ignore /vendor all this stuff will
be ignore, and we wanna only ignore /vendor/ruby because its only
contains stuff installed by Bundler
Merge pull request #1 from fernandes/haml-coffee-sass

Support Haml Coffee Sass