Git commits in Moodle 2.4.5 by Ruslan Kabalin

commit 478cac84e10c8584b957a4c255379840c68514c7
Author: Ruslan Kabalin <r.kabalin@lancaster.ac.uk>
Date:   Mon, 20 May 2013 21:08:34 +0800
Tag:    v2.4.5

MDL-39760: mod_assign: Add few more callback methods.

commit c07c4324c725a01d35e4553cb08111c202dd7927
Author: Ruslan Kabalin <r.kabalin@lancaster.ac.uk>
Date:   Fri, 17 May 2013 22:47:50 +0800
Tag:    v2.4.5

MDL-39760: mod_assign: Make submit_for_grading accept submission as parameter.

commit 8a06e21c2afa77e2f6a48af822378c0f1e110adf
Author: Ruslan Kabalin <r.kabalin@lancaster.ac.uk>
Date:   Fri, 17 May 2013 22:47:50 +0800
Tag:    v2.4.5

MDL-39761: mod_assign: Always check submission plugin status and visibility.

commit 8401eb9425b4fcffcf5aba2a0713002b467f8cfb
Author: Ruslan Kabalin <r.kabalin@lancaster.ac.uk>
Date:   Fri, 01 Feb 2013 19:41:08 +0800
Tag:    v2.4.5

MDL-33546: course: Fix current week hightlighting after dragging the section