[sample] Improve user sample data
[sample] Rename gaku:sample:load to db:sample
[core] Change pagination to be non ajax in students index
[core] Add active scope to Student and clean students_controller
[core] Update gaku_forms to 0.1.4
[spec] Add count? helper to request_helpers
[spec/requests] Improve admin/roles_spec
[views] Improve admin/roles views
[gem] Include responders gem
[factories] Add invalid_role factory
[spec/controllers] Add admin/roles_controller_spec
[controllers] Refactor admin/roles_controllers to use responders