Default to null rather than an empty string
Mended auth success redirect
Mended function signatures, added OPTIONS verb

 * Mended function signatures to comply with the new `tornado.web.Application` wrapper
 * added OPTIONS verb for responses, for not really any reason in particular
Make sure to unload all removal request models on logout, and some comments
Assertions \o/
Removed need for ApplicationRouteMixin, and subsequently the explicit InfoRoute
DRY ftw \o/
Updated EmberJS && EmberData
Using the ActiveModelSerializer simplifies things greatly