Git commits in Moodle 2.2.x by Jonathan Champ

commit d557253610c99af89c62a5b898742a5ee457f550
Author: Jonathan Champ <jonathan_champ@ncsu.edu>
Date:   Wed, 19 Oct 2011 05:24:59 +0800
Tag:    v2.2.7

MDL-29733 grade: Query for Identifying Grade Grades to Precreate is SLOW