Git commits in Moodle 3.1.0 by Daniel Neis Araujo

commit dfb9daeae25ef1bca1fc350fe9fedd693da857b6
Author: Daniel Neis Araujo <danielneis@gmail.com>
Date:   Wed, 06 Apr 2016 04:52:19 +0800
Tag:    v3.1.0-beta

MDL-52385 tasks: Queue ad-hoc tasks in future