Git commits in Moodle 2.5.3 by Fred Woolard

commit b8fe053e0da99055a09f9e207fb53447d987109b
Author: Fred Woolard <woolardfa@appstate.edu>
Date:   Tue, 01 Oct 2013 03:51:35 +0800
Tag:    v2.5.3

MDL-42069 mod_quiz add lastname sort for manual grading