More security measures for the ww3 course manager.
redirect a student user to the ww2 student page.
Merge branch 'ww3' of https://github.com/openwebwork/webwork2 into ww3-feature/security

Conflicts:
	webwork3/public/js/apps/CourseManager/CourseManager.js
Merge pull request #442 from pstaabp/ww3-feature/security

More security measures for the ww3 course manager.