Git commits in Moodle 3.5.2 by Adrian Greeve

commit 3482ea90a6e296aa2161e507f10a98355f746259
Author: Adrian Greeve <abgreeve@gmail.com>
Date:   Mon, 09 Jul 2018 11:05:57 +0800
Tag:    v3.5.2

MDL-62849 files lib: Add method to return all files.