Merge pull request #10 from railsrumble/frontend

Frontend
Remove correct answer from track entries.
Export check choice_id for Track to API.
Make index view a bit prettier
Make index view really pretty
Make Backbone speak Rails
Bind answers to tracks and get the success back
Refresh UI on answer check callback
Mono-button game statemachine
Merge branch 'frontend' of github.com:railsrumble/r13-team-554 into frontend
Fight against f****ng events