Users can now leave comments on songs
When creating a comment's status, also create the song's status
Display a comment's status transition
Prettify statuses
Add Admin::ProgressesController for managing statuses
Admins can now set a default status for songs!
Only select users with the 'change progress status' box selected have permisssion to change statuses
Protect status_id from users who do not have permission to change it
Merge branch 'Progress-Status'