Fixed /admin/users
ArgumentError in Admin::UsersController#index
wrong number of arguments (1 for 0)

Rails 4 has depricated "all" method, now it's default behaviour
Update users_controller.rb
Update users_controller.rb
redesigned fix
removed :email field from delegate
Merge pull request #95 from alter/master

Fixed /admin/users
some basic tests for admin/users controller, fixed bug in admin/users controller for displaying users
Removed database cleaner
Removed SignIn Macros
Removed file