Git commits in Moodle 3.0.1 by Adrian Greeve

commit 1da82165efb1658b67044dc72d45a5c772e46e72
Author: Adrian Greeve <adrian@moodle.com>
Date:   Tue, 09 Jun 2015 14:06:42 +0800
Tag:    v3.0.1

MDL-37308 files: convert_image() now supports transparency.