Git commits in Moodle 2.9.0 by Viduranga Wijesooriya

commit 21e6aabce9ce9e59d512dd8e899c05042cb41185
Author: Viduranga Wijesooriya <vpowerrc@gmail.com>
Date:   Thu, 26 Mar 2015 03:33:45 +0800
Tag:    v2.9.0-rc1

MDL-49477 availability_grade-form: checkbox disable problem fixed