Git commits in Moodle 3.1.0 by Sam Hemelryk

commit 7797d7ead0c628cbff2bf888cb7eef621350ab08
Author: Sam Hemelryk <sam@moodle.com>
Date:   Thu, 11 Dec 2014 11:49:58 +0800
Tag:    v3.1.0-beta

MDL-48506 cachestore_memcached: added upgrade notice

commit 957e0c7567b95e448fc9cc65d2b51a50f379963a
Author: Sam Hemelryk <sam@moodle.com>
Date:   Thu, 11 Dec 2014 11:42:21 +0800
Tag:    v3.1.0-beta

MDL-48506 cachestore_memcached: is now multi-site safe