fix backstage statute
fix backstage event
fix backstage record
fix backstage board, post & comment
fix backstage board, post & comment
Merge branch 'feature/fix_backstage' into develop
clean upload
Merge branch 'develop' of http://github.com/sunkai612/NTUGSA_site into develop

Conflicts:
	app/models/rotator.rb
	app/views/admin/rotators/_form.html.erb