Developer credits

Git commits in Moodle 2.4.8 by Dan Poltawski

commit bea3c273a3afd705e22963b85d5bf67f50c9b167
Author: Dan Poltawski <dan@moodle.com>
Date:   Tue, 10 Dec 2013 11:54:13 +0800
Tag:    v2.4.8

MDL-43306 restore: fix grade item sortorder restoration

commit 98f4a31ce05b864481132222b292a6388d3d5b46
Author: Dan Poltawski <dan@moodle.com>
Date:   Thu, 05 Dec 2013 15:09:59 +0800
Tag:    v2.4.8

weekly release 2.4.7+

commit 828aff67d9e4625e770cfd4afca86e2357e96f63
Author: Dan Poltawski <dan@moodle.com>
Date:   Fri, 29 Nov 2013 12:52:44 +0800
Tag:    v2.4.8

weekly release 2.4.7+