Git commits in Moodle 3.1.1 by Davo Smith

commit b3a751da05942b9dda82803c45b0592794498e0d
Author: Davo Smith <git@davosmith.co.uk>
Date:   Wed, 29 Jun 2016 15:44:24 +0800
Tag:    v3.1.1

MDL-55057 mod_scorm: fix handling of SCO identifiers with apostrophes