Revert "Fix moving of directories by drag and drop"

This reverts commit ce11bbb1ab93eff374b0d10ac87c28a1f7a8580f.
Implemented the right authentication_create to support users that can't login
Fix drag and drop pages
Fix drag and drop of dirs
Fix for tests to incorporate new authentication_create right and support for different skyline_path
Add authentication_create test to UserTest
Use right_prefix in Article.editable_by? to allow subclass-specific editing privileges, includes tests
Create a new referable uri too if we have created a new ref
Fix comparison of new and previous referable
Fix for bug that prevented renaming media files: rename skyline_media_file to media_file.
Update sprockets gemspec to match latest rails version
Add fix for bug that caused plugin routes not be loaded correctly in rails 3.2.9 - 3.2.11, should be fixed in next release
Use Skyline::SessionStore to use ActiveRecord Session without conflicting with app sessions
Only add valid MediaDirs as parent
rack.session.record is a separate key, needs to be added to session_scrubber when using ActiveRecord sessions
Added support for password expiration messages
Upgraded Rails dependency to 3.2.13 and removed the now obsolete RouteSet monkey patch
Fix Skyline::SesssionStore STI bug when there is no sessions table
Fix for bug in user model where password checks would be ignored
User object will be nil when it can't be found