Git commits in Moodle 2.5.3 by Mohamed Alsharaf

commit a12346d5277c20e01edb5f5469b0fbbc79218a08
Author: Mohamed Alsharaf <mohamed.alsharaf@gmail.com>
Date:   Tue, 30 Jul 2013 10:01:26 +0800
Tag:    v2.5.3

MDL-27684 repository: make require_login() throws exception instead of redirect