Add course sign-up
Add database insertion
Fix issues
Update with master
Fixing issues (Tested!)
Fix conflicts
Fix issues & add a failure scenario
Add missing failure scenario
Fix issues
Remove extra line
Fixing conflicts
Fixing conflicts, agian
Removind extra line, agian
Removing old routes
Removing routes' extra line
Removing courses_controller's extra line
Adding view author comment
Fix bug & html comment
Fixing documentation
Merge pull request #197 from alaashafaee/C2_Moataz_164_course_sign_up_2.6

Course sign up 2.6