Git commits in Moodle 2.5.6 by Andrew Davis

commit e7f899e32a974115cececf9a00e5db5d528cb18f
Author: Andrew Davis <andrew@moodle.com>
Date:   Sat, 26 Apr 2014 21:16:29 +0800
Tag:    v2.5.6

MDL-45282 core_user: fixed up some oddities in the bulk user messaging screen

commit e8ae121fd7a2818273e5fed2fda770faeaf77686
Author: Andrew Davis <andrew@moodle.com>
Date:   Tue, 22 Apr 2014 11:51:40 +0800
Tag:    v2.5.6

MDL-45172 block_completionstatus: added a check for an empty string before appending