Developer credits

Git commits in Moodle 2.6.1 by Ruslan Kabalin

commit d149d894a0214a19116a37481b4cf868edacbc80
Author: Ruslan Kabalin <r.kabalin@lancaster.ac.uk>
Date:   Tue, 26 Nov 2013 22:29:56 +0800
Tag:    v2.6.1

MDL-43071 assign: Fix offline grades import for scale grading.