Git commits in Moodle 3.5.0 by Nick Phillips

commit 28437460d2c1a933391e2a7845b5a3fa04800c86
Author: Nick Phillips <nick.phillips@otago.ac.nz>
Date:   Tue, 17 Oct 2017 06:46:11 +0800
Tag:    v3.5.0-beta

MDL-56688 grade: fix ordering of grade items in grade_seq::flatten

commit 7d4f34cb0d340aff4793974a888168efe0696b0f
Author: Nick Phillips <nick.phillips@otago.ac.nz>
Date:   Mon, 15 May 2017 07:55:49 +0800
Tag:    v3.5.0-beta

MDL-55532 gradebook: fix grade export to include category names