Git commits in Moodle 2.5.2 by Ashley Holman

commit fae11d2ef1b43909f964998fe7f17171fe99c210
Author: Ashley Holman <ashley@netspot.com.au>
Date:   Wed, 29 May 2013 12:07:38 +0800
Tag:    v2.5.2

MDL-34989 assign: Allow students to submit when grade is overriden