Git commits in Moodle 2.6.3 by Andrew Davis

commit 21a1cee1060b4e6db6ae506d59fe134ed05226f9
Author: Andrew Davis <andrew@moodle.com>
Date:   Sat, 26 Apr 2014 21:16:29 +0800
Tag:    v2.6.3

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

commit b7055f89d419dc6c3e72a5f16cefdb366adc08b7
Author: Andrew Davis <andrew@moodle.com>
Date:   Tue, 22 Apr 2014 11:51:40 +0800
Tag:    v2.6.3

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