Git commits in Moodle 2.5.3 by Henning Bostelmann

commit eb6492e62ff270902d1ead1abb6f820bcc89775d
Author: Henning Bostelmann <henning.bostelmann@york.ac.uk>
Date:   Fri, 06 Sep 2013 20:35:08 +0800
Tag:    v2.5.3

MDL-29987 File resource: fix problem with PDF display on mobile devices