Git commits in Moodle 2.4.x by Damyon Wiese

commit 37eb2caa406749cc87f1502719e295be4e13a531
Author: Damyon Wiese <damyonw@moodle.com>
Date:   Wed, 21 Nov 2012 11:57:47 +0800
Tag:    v2.4.0-rc1

MDL-36012: Assignment, Accessibility - Add user information to alt text for grade icon in grading table.

commit 11b20949685cd729fab3857cd93f74b2384d2969
Author: Damyon Wiese <damyonw@moodle.com>
Date:   Wed, 21 Nov 2012 11:10:12 +0800
Tag:    v2.4.0-rc1

MDL-36184: Assignment quickgrading should only update lastmodified dates for modified submissions

commit 3b7a18f2e5881c8a738f9cd23037bf4c7efd0448
Author: Damyon Wiese <damyonw@moodle.com>
Date:   Wed, 21 Nov 2012 09:19:45 +0800
Tag:    v2.4.1

MDL-36167: Assignment quickgrading fix when there is no grade (ensure feedback still saves)