Merge pull request #14 from PhamPhi/develop

Details Courses
Merge pull request #16 from PhamPhi/develop

Delete-Courses
Admin: create, delete, list all supervisor
Merge pull request #15 from caiduoi/develop

Admin: create, delete, list all supervisor
Assigment supervisor
Merge pull request #18 from PhamPhi/develop

Delete-Courses
Merge pull request #19 from caiduoi/develop

Assigment supervisor
Fixed Deleted-New Courses