Git commits in Moodle 2.8.9 by Matt Davidson

commit cbb94a638ed172f149dd0e42c7c06c1856072f40
Author: Matt Davidson <davidso1@rose-hulman.edu>
Date:   Fri, 23 Oct 2015 21:31:20 +0800
Tag:    v2.8.9

MDL-51779 assign: PDF annotate quality