eval publish and unpublish actions
Merge branch 'AccessControl' into 73683892
Merge branch 'AccessControl' into 73657780
remove of unused .idea folder
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 'dev' into AccessControl
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
givers can modify their own comments
show edit/delete link for comments made by the instructor
Merge branch '73779920' into AccessControl
submit link is disabled for people who cannot submit for the session
Merge branch '73780066' into AccessControl