Git commits in Moodle 2.1.6 by Aaron Barnes

commit 2e67e5ecbb407cf80dc25f2c2fc7135eaea61ae5
Author: Aaron Barnes <aaronb@catalyst.net.nz>
Date:   Wed, 11 Apr 2012 14:54:40 +0800
Tag:    v2.1.6

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