Git merges in Moodle 2.2.8 by Damyon Wiese

commit 955980b2383284d0018a9654032db57fa97e8713
Author: Damyon Wiese <damyon@moodle.com>
Date:   Thu, 14 Feb 2013 14:00:53 +0800
Tag:    v2.2.8

Merge branch 'install_22_STABLE' of git://git.moodle.cz/moodle-install into MOODLE_22_STABLE