Git commits in Moodle 2.4.9 by Tim Hunt

commit 9b19a4609949b81dd8901bf8d4b24390a5510338
Author: Tim Hunt <T.J.Hunt@open.ac.uk>
Date:   Thu, 13 Feb 2014 20:26:32 +0800
Tag:    v2.4.9

MDL-44118 new environment check are all quiz attempts upgraded.

commit 16ae4b809d4e5b422d12d787402cbf409dbf8ee1
Author: Tim Hunt <T.J.Hunt@open.ac.uk>
Date:   Thu, 06 Feb 2014 17:50:30 +0800
Tag:    v2.4.9

MDL-44018 quesiton variant was not backed up or restored.

commit fd4b7f57399bed85db0d4066ba12c2633ce87ba3
Author: Tim Hunt <T.J.Hunt@open.ac.uk>
Date:   Tue, 14 Jan 2014 21:40:11 +0800
Tag:    v2.4.9

MDL-43690 quiz_question_tostring missing s().