Developer credits
Git commits in Moodle 3.1.x by Jetha Chan
commit 623c947f2b0ac41b5cd489701c3411a1f6be5ff3 Author: Jetha Chan <jetha@moodle.com> Date: Tue, 09 Jun 2015 17:12:31 +0800 Tag: v3.1.0-beta MDL-37308 files: support transparency when not resizing; new unit test