Git commits in Moodle 2.8.4 by Mike Grant

commit 361370bae375bfd13f7c8fefd998e34f9f5dad4f
Author: Mike Grant <michael.grant@bcu.ac.uk>
Date:   Mon, 09 Feb 2015 17:41:32 +0800
Tag:    v2.8.4

MDL-37470 blocklib: Respect block weight and offset