Git commits in Moodle 2.4.6 by Ashley Holman

commit 214dd19aa2bbf6bae07729664738a51ae00e58ec
Author: Ashley Holman <ashley@netspot.com.au>
Date:   Wed, 29 May 2013 12:07:38 +0800
Tag:    v2.4.6

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