Developer credits

Git commits in Moodle 2.4.0 by Yang Yang

commit 74961c826a3a3806826322f22eeeb85415407114
Author: Yang Yang <doraemonyoung@yahoo.com>
Date:   Fri, 13 Apr 2012 08:46:44 +0800
Tag:    v2.4.0-beta

reset

commit 93a1cfa8ee53464603c7e8712665df9704d72c14
Author: Yang Yang <doraemonyoung@yahoo.com>
Date:   Fri, 13 Apr 2012 08:43:06 +0800
Tag:    v2.4.0-beta

reset

commit 01c580ab050f7931b77b190865047b8e6650bdb4
Author: Yang Yang <doraemonyoung@yahoo.com>
Date:   Fri, 13 Apr 2012 07:37:06 +0800
Tag:    v2.4.0-beta

MDL-31863 added modified_since value in parameters and timemodified in return value