Git commits in Moodle 2.5.6 by Mark Nelson

commit 9941015719002dc4579d1a7d118ce8190644fdc0
Author: Mark Nelson <markn@moodle.com>
Date:   Wed, 09 Apr 2014 15:00:25 +0800
Tag:    v2.5.6

MDL-42462 mod_feedback: added $OUTPUT to list of global variables used to avoid error