Git commits in Moodle 2.1.6 by Ruslan Kabalin

commit fa13450de9d86d3f6ded95c2efefe284d04f094a
Author: Ruslan Kabalin <ruslan.kabalin@luns.net.uk>
Date:   Sat, 10 Mar 2012 00:32:39 +0800
Tag:    v2.1.6

MDL-32026 messaging: Fix non-existing variable in the error output

commit 613b57021d1ee2a83460dcb853b0f5b2c23761ab
Author: Ruslan Kabalin <ruslan.kabalin@luns.net.uk>
Date:   Thu, 08 Mar 2012 18:19:20 +0800
Tag:    v2.1.6

MDL-18095 gradebook: Make sure grade override flag is cleared whenever required

commit 08fb6ca3f134f74b77334b1da630a85e43a1a04a
Author: Ruslan Kabalin <ruslan.kabalin@luns.net.uk>
Date:   Tue, 06 Mar 2012 22:54:13 +0800
Tag:    v2.1.6

MDL-31919 Fix assignment overview output to respect gradebook grading.

commit 0b50793e41960860a7450b91a7f5c26569ee69d1
Author: Ruslan Kabalin <ruslan.kabalin@luns.net.uk>
Date:   Tue, 06 Mar 2012 22:50:55 +0800
Tag:    v2.1.6

MDL-31917 Improve assigment submission usability

commit 1a19ad38660b8bc5dd5b22bfb0510b52ed0dc1ce
Author: Ruslan Kabalin <ruslan.kabalin@luns.net.uk>
Date:   Tue, 28 Feb 2012 19:15:03 +0800
Tag:    v2.1.6

MDL-31808 Upload assignment: fix user feedback display