Git commits in Moodle 2.6.3 by Steve Clay

commit 06a76addad76b591a908d5a939ed6f312c5425d7
Author: Steve Clay <steve@mrclay.org>
Date:   Tue, 15 Apr 2014 06:20:08 +0800
Tag:    v2.6.3

MDL-45096 block_navigation: Check for existence of the siteadminbranch before modifying it