Git commits in Moodle 2.5.3 by Tim Lock

commit 06e8ce4f880f187d156944a491aea95ae823ba36
Author: Tim Lock <tim.lock@netspot.com.au>
Date:   Thu, 26 Sep 2013 12:14:15 +0800
Tag:    v2.5.3

MDL-41996: Don't show the Review Attempt link if no attempts exist.

commit 7258ef74f5b8fe228e8ff3e2bd6b4d81359e0074
Author: Tim Lock <tim.lock@netspot.com.au>
Date:   Fri, 20 Sep 2013 08:15:26 +0800
Tag:    v2.5.3

MDL-41908 QuickForm: Fix PEAR Non-static method error