Add additional security checked for quiz edit
Updated studentlist

Added some option value for grade and some ajax that need to be
connected. Need to look at "submitted" in the database also since this
is updated every time you update a row in the database table but when
changing the grade should not change the "submitted" date.
Added security updates on quiz menu
get template info update
Updated studentlist
Check all variables is present in quiz menu
Removed non vital variable check
Fixed a syntax error
Update studentlist

Some updates
Make sure qid is of an integer type
Additional data check for quiz menu
Fixed database errors in my results
Removed broken database content
Fixed studentlist + my results bugs
Made it possible to actually take a test
Fixed bugs in my results and studentlist
More bugfixed with studentlist and my results
Fixed a bug in my results

Fixed a bug where the my results page printed a 'U' if a user hadn't
finished a quiz.
Release date checks and other fixes

We want to make sure the user read access (not that they are a
superuser) addtionally, checking for the existence of template file
seems redundant since it'll cause a failed include anyway.
Minor text fixes