Git commits in Moodle 2.7.6 by Mike Grant

commit 8cb2cbbf98921a9df18e10e43475c7b54e7b3905
Author: Mike Grant <michael.grant@bcu.ac.uk>
Date:   Mon, 09 Feb 2015 17:41:32 +0800
Tag:    v2.7.6

MDL-37470 blocklib: Respect block weight and offset