Issue 2: = Task 2 = Title: Implement the functionality that a student can only commit opinions once for a lecture Type
Status:  Accepted
Owner:

Blocked on:
issue 1

Blocking:
issue 3
Project Member Reported by aki...@gmail.com, Aug 31, 2011
task Desc:

A student should be able to commit opinions anonymously.Each student is only allowed to commit his/her opinions once for one lecture.