quiz 7.x-4.0-beta2

Important: This version changes access control for quiz questions. Make sure access to creating, editing and viewing quiz questions is as expected after updating to this version.

Fixes a couple of security problems where users with permission to see other users answers also are able to delete other users answers, and also the default views provided with the module doesn't have any default permission checking.

Additionally this has been done:
1. Repeat until correct feature has been fixed
2. Compatibility with quiz progress has been improved
3. Better date handling in quiz mails
4. Postgres compatibility improved
5. Userpoints integration improved
6. Fixed AJAX HTTP error occurs when attempting to update quiz module via update.php.
7. Fixed PDOException Out of range value for column 'time_left()'.
8. Fixed Quiz question browser shows links even if user has no rights to see question nodes outside of quiz.
9. Fixed Do not make questions type node access dependend on quiz node.
10. Fixed Quiz ddlines type has wrong form validate in hook_config()
11. On quiz result page: displaying username instead of 'this person...'
12. Made short answer's correct answer and user answers ignore trailing and leading whitespaces (trim)
13. Added confirm message when user are finishing quiz