fixed a bug in prev commit
added displayedName
instructorHome and courses page update
Merge branch 'AccessControl' into 73272642
UI change
Merge branch 'AccessControl' into 73272642
update and add done for saving input data
javascript frontend loading
modify instructor ready
enroll students done
instructorCourseStudentDelete and Edit
disabling links
add Eval
add feedback
eval and feedback edit and delete actions
added verifyAccess
refactoring courseDelete
instructorCourseInstructorAdd/Edit/Delete
instructorCourseStudent related actions
instructorCourseInstructorDelete action: more strict condition