MDL-16334 Convert mod/quiz/comment.php to use attemptlib.php - final part of the work on the quiz navigtion, I hope. MDL-16559 Remove question/comment.html template, and instead just have a function in questionlib.php MDL-16562 Regression from MDL-16263, notices when regrading.
Sorry, the three got tangled together (coupled through questionlib) while I was fixing bugs in preparation for a demo.