Git commits in Moodle 2.7.2 by Jonathon Fowler

commit b7cb9c60c11b2f28ce61b03e516f4c554ad1ecd6
Author: Jonathon Fowler <fowlerj@usq.edu.au>
Date:   Wed, 25 Jun 2014 10:14:31 +0800
Tag:    v2.7.2

MDL-46080 assign: fix offline grading worksheet marker column