an unregistered student can now view/submit feedback sessions for open session
student can now view results of a feedback session
now emails include the links to the unregistered actions
wait for the page to finish the animation
Merge branch 'dev' into AccessControl
Merge branch 'dev' into AccessControl

Conflicts:
	src/test/java/teammates/test/pageobjects/InstructorCourseEditPage.java
ported login filter to action level check
Merge branch 'dev' into 74749654

Conflicts:
	src/main/java/teammates/logic/core/Emails.java
Merge branch 'dev' into AccessControl
Merge branch 'master' into AccessControl
basic infrastructure in place for not loggedin and unregistered access to pages
Merge branch 'rc' into 74749654
all tests that need to be fixed have been fixed
StudentCourseJoinAction is functional
logout page gives hint
confirmation page redirects properly
Merge branch 'dev' into 74749654
moved CourseJoinLink creation to StudentAttributes
components test passes
Merge branch 'dev' into AccessControl
Modified instructor help page to remove info on evaluations and add info on feedback sessions