Toggle Admin/User Status Completed

Current User cannot update their own Status and non admin users cant
access admin panel.
fixed linebreak/user_list issue, deleted files.

Got rid of the linebreaks and changed @user_list to @users. Also deleted
admin_user_controller.
added _user partial
Added decorator and refactored UsersController
add remove_artists migration
added building and artpiecebuilding migrations
Merge pull request #22 from osulp/feature/AdminSpec

Toggle Admin/User Status Completed