MMLC-103 Allow users to sign up. Move to a backbone.js amd model for the front end so that we can rely solely on the api.
MMLC-78 handle mathjax errors. Start on navbar view
Merge remote-tracking branch 'upstream/master'
Start logging in through navbar
Merge pull request #59 from meghanlarson/master

fix html5 mathjax error handling, start user login/registration