Author: Tim Hunt
MDL-3030 quiz overdue handling: display message on the summary page.
This change also includes a clean-up of how we display and initialise the countdown timer.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=2b2b6458422e38e126bbdae752d84f90b93761c2
http://github.com/moodle/moodle/commit/2b2b6458422e38e126bbdae752d84f90b93761c2
+ 2.3 en [mustbesubmittedby,mod_quiz]
+ 2.3 en [overduemustbesubmittedby,mod_quiz]