Add language buttons to test translations
Add event registry and event bridges

Add event registry and event bridges to control communication between
the app (angular) and the iframe editor (jquery)
Add unit test for getRegistry method
Update indent size to 4 spaces
Enable CSS transitions between dashboard, preview and full screen views
Add project and user menus to navigation
Merge remote-tracking branch 'david/master'
Merge remote-tracking branch 'upstream/master'