Add mongoid.
Add devise with a User model.
Authenticate before accessing forms controller.
Add default devise views.
Add ability to authenticate via AJAX.

From here: http://jessehowarth.com/2011/04/27/ajax-login-with-devise
Add filter to not use CSRF for json requests.
Cleanup devise initalizers.
Use username field instead of email for users.
Fix issues with devise logging in.
Get devise working with tests.
Use factory_girl to create users to login for tests.