Git commits in Moodle 3.7.0 by Alex Walker

commit f14afd29365a0d14bda08a9acdb880257ecd092f
Author: Alex Walker <alex.walker@glasgow.ac.uk>
Date:   Wed, 01 Jun 2016 22:21:41 +0800
Tag:    v3.7.0-beta

MDL-49673 mod_assign: option to hide grader