Git commits in Moodle 2.7.8 by Jetha Chan

commit d3c05d5bab23d48b043cf5cce78fd6c3b707022f
Author: Jetha Chan <jetha@moodle.com>
Date:   Mon, 09 Mar 2015 17:22:22 +0800
Tag:    v2.7.8

MDL-49442 javascript: add handlebars hashtable to support get_string