Git commits in Moodle 2.7.3 by Andrew Schmadel

commit 19b0b0bb7fdc69f5dd84040b487546042f3e9a11
Author: Andrew Schmadel <aschmadel@learningobjects.com>
Date:   Sat, 23 Aug 2014 07:09:18 +0800
Tag:    v2.7.3

MDL-46844 Embed LTI External Tools with an IFrame