Git commits in Moodle 2.2.3 by Aaron Barnes

commit b795d69cc307e353dc50b0f4669a160b85334424
Author: Aaron Barnes <aaronb@catalyst.net.nz>
Date:   Wed, 11 Apr 2012 14:54:40 +0800
Tag:    v2.2.3

MDL-32249 completion: Round course grades and remove hardcoded string