Git commits in Moodle 2.9.1 by Adam Olley

commit 28e427c0f98d502c821d8c431ac16b246faa366e
Author: Adam Olley <adam.olley@netspot.com.au>
Date:   Fri, 22 May 2015 11:26:20 +0800
Tag:    v2.9.1

MDL-50176 repository_youtube: Switch to using YouTube Data API