Git commits in Moodle 2.5.4 by Ruslan Kabalin

commit 3bc1bd6ee8fd5d86e3217b9bcadd74b9a0814af6
Author: Ruslan Kabalin <r.kabalin@lancaster.ac.uk>
Date:   Tue, 26 Nov 2013 22:29:56 +0800
Tag:    v2.5.4

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