Git commits in Moodle 2.6.2 by Eric Merrill

commit 2a2176186d415037e1a2b31f69459fbf848207ae
Author: Eric Merrill <merrill@oakland.edu>
Date:   Fri, 07 Feb 2014 22:29:12 +0800
Tag:    v2.6.2

MDL-44046 gradebook Reduce duplicates returned during sortorder fixing.

commit e29585b206feff5c166e096a124beb7ce807e54a
Author: Eric Merrill <merrill@oakland.edu>
Date:   Wed, 05 Feb 2014 22:56:34 +0800
Tag:    v2.6.2

MDL-43946 gradebook upgrade Improve SQL to find duplicate sortorders.

commit ff71f552650980f4243c01b34bd76b465efd52be
Author: Eric Merrill <merrill@oakland.edu>
Date:   Wed, 22 Jan 2014 21:57:53 +0800
Tag:    v2.6.2

MDL-43794 Files API Set the mtime of files to extraction time.

commit 2d73ec85ea3b9cce08bd93511dafb898d5505d5c
Author: Eric Merrill <merrill@oakland.edu>
Date:   Thu, 16 Jan 2014 07:15:05 +0800
Tag:    v2.6.2

MDL-43732 quiz Fix styles so that question div doesn't overlap controls.