History: Quiz

Some ideas:
* If you pass a quiz (or get a certain score), you get added to a group
* If you fail a quiz (or get a certain score), you get added to a group
* Permit non-registered users to take a quiz (with non-verified username/email, like comments)
* bug Tiki9: time limit doesn't countdown
* bug Tiki9: can't assign object perms
* Question Type: optional + file type is less useful than adding optional + text field (so people can comment)
* Import questions from text is interesting, but there is no way to indicate number of points for question and each answer
* There should be an option to see your score and the right answers

!! Open
{wishes filtervalue="42" status="o"}

!! Pending
{wishes filtervalue="42" status="p"}

!! Closed
{wishes filtervalue="42" status="c"}