Git commits in Moodle 2.9.0 by Michael Wheeler

commit 3871db0ac23e05fb42641ed779e506bbe8444072
Author: Michael Wheeler <mwheeler@centertech.com>
Date:   Wed, 15 Oct 2014 02:14:47 +0800
Tag:    v2.9.0-beta

MDL-46960 completionlib: Move completion cache to MUC.