Git commits in Moodle 3.1.0 by Krista Koivisto

commit 7b9fbb1cf4228b39f81454cdb8370e7853fbe184
Author: Krista Koivisto <krista@kittysec.org>
Date:   Thu, 04 Feb 2016 13:51:06 +0800
Tag:    v3.1.0-beta

MDL-52774 ajax: Require authentication when getting nav branch