Git commits in Moodle 2.5.9 by Damyon Wiese

commit 15bde5352bd4bdb54105c0fdfd956c9ca420e4c6
Author: Damyon Wiese <damyon@moodle.com>
Date:   Tue, 04 Nov 2014 06:46:57 +0800
Tag:    v2.5.9

MDL-47927 LTI: Use PARAM_TEXT and p() for returned messages and errors