Git commits in Moodle 2.6.4 by Jonathon Fowler

commit f8840f947ca395546f3901b3f511e60b5800be38
Author: Jonathon Fowler <fowlerj@usq.edu.au>
Date:   Wed, 07 May 2014 14:11:23 +0800
Tag:    v2.6.4

MDL-42531 assign: refactor batch operations to use forms properly