Travis ci support

Hooked up to just jshint for now. 

Great for unit tests when/if they exist.

http://about.travis-ci.org/docs/user/getting-started/ has more notes on how to get setup.

http://about.travis-ci.org/docs/user/getting-started/#Step-two%3A-Activate-GitHub-Service-Hook is the important step (probably should be done before the merge).