Merge branch 'AccessControl' into 73683892
Merge branch 'AccessControl' into 73683892
fixing the bug with adding instructor
added more disabled in studentlist and coursedetails
commentAddActionAccessControl
adding filtering and UI adjustment to instructorComments page
completing comments in courseLevel. tests later
Merge branch 'AccessControl' into 73683892

Conflicts:
	src/main/java/teammates/ui/controller/InstructorCommentsPageAction.java
	src/main/webapp/jsp/instructorStudentRecords.jsp
completing tests for new methods
fixing tests
Merge branch '73683892' into AccessControl