Add Users and Roles to Admin menu
Try cancan for students_controller
WIP : Add basic auth
Merge branch 'roles' of https://github.com/tapalilov/GAKUEngine into roles
WIP : Fix spec/requests/admin after auth inclusion
WIP : Fix spec/requests/students after auth inclusion
Fix class_groups specs after auth inclusion
Clean unneeded notes_controllers
Fix course_groups specs
Fix courses specs after auth inclusion
Fix exams specs after auth inclusion
Fix extracurricular_activities specs after auth inclusion
Fix syllabuses specs after auth inclusion
Fix controller specs
Fix model specs
Fix some request specs
Create permission checks via ensures
Fix spec/controllers/gaku/class_group_enrollments_controller_spec
Delete empty controller specs
Delete test folder