Git commits in Moodle 2.3.4 by Mark Nielsen

commit c85164da325e149ea8dfa70bf0c837f023011ca5
Author: Mark Nielsen <mark@moodlerooms.com>
Date:   Thu, 15 Nov 2012 07:35:14 +0800
Tag:    v2.3.4

MDL-36607: Improve block drag and drop

commit ccca91bd9e1b5ac20d7196ba0393135120ba0f67
Author: Mark Nielsen <mark@moodlerooms.com>
Date:   Wed, 14 Nov 2012 04:55:44 +0800
Tag:    v2.3.4

MDL-36579: Adding missing fields in mod/lti backup

commit c9af37c4abd4590e16b8319c962102da2f8fbde5
Author: Mark Nielsen <mark@moodlerooms.com>
Date:   Wed, 14 Nov 2012 04:45:02 +0800
Tag:    v2.3.4

MDL-36336: Prevent duplicate grade items on restore