Switch to "Controller as " syntax

Remove ng-route
Add Concert resource
Add missing {} for rails 4 default_scope
Server-side implementation of listen_events/last
Fix bad json serialization of listen events
Update json.jbuilders for uncaught model changes
Wire up CurrentController to API
WIP on button linking

Can’t get start_listening/finish_listening methods to work.

It's an invalid authenticity token!

      Started POST "/recordings/2/finish_listening.json" for 127.0.0.1 at 2014-12-20 00:12:38 -0500
      Processing by RecordingsController#finish_listening as JSON
        Parameters: {"id"=>"2", "title"=>"ff", "concert_id"=>1, "created_at"=>"2014-04-13T18:44:43.089Z", "updated_at"=>"2014-04-13T19:54:09.905Z", "recording"=>{"id"=>"2", "title"=>"ff", "concert_id"=>1, "created_at"=>"2014-04-13T18:44:43.089Z", "updated_at"=>"2014-04-13T19:54:09.905Z"}}
      Can't verify CSRF token authenticity
      Completed 422 Unprocessable Entity in 1ms

      ActionController::InvalidAuthenticityToken (ActionController::InvalidAuthenticityToken):