Git commits in Moodle 2.3.5 by Chris Scribner

commit 78f3381eb48522d1c38f1f9951ac228b1bbae7f2
Author: Chris Scribner <scriby@gmail.com>
Date:   Tue, 24 Apr 2012 22:48:47 +0800
Tag:    v2.3.5

Fixing an issue with not sending the launch_presentation_return_url