Git commits in Moodle 2.4.11 by Tim Hunt

commit 2576939e4daa048cfc5b9b0a5a6fd81b65306822
Author: Tim Hunt <T.J.Hunt@open.ac.uk>
Date:   Wed, 09 Jul 2014 20:47:40 +0800
Tag:    v2.4.11

MDL-46148 qtype_calculatedsimple: fix notice

commit c8beaf6d70228396a1a6fa8cc96f837be24505c9
Author: Tim Hunt <T.J.Hunt@open.ac.uk>
Date:   Wed, 09 Jul 2014 20:35:09 +0800
Tag:    v2.4.11

MDL-46148 qtype_calculated: fix validation when importing.

commit 64d9b08a999fd49b19b12a4a9a3a68624bde18b8
Author: Tim Hunt <T.J.Hunt@open.ac.uk>
Date:   Wed, 09 Jul 2014 19:56:18 +0800
Tag:    v2.4.11

MDL-46148 qtype_calculated: removed unused method.

commit a2bf5412a7a4daa2961ae6484cd5af90fd74e4e1
Author: Tim Hunt <T.J.Hunt@open.ac.uk>
Date:   Thu, 26 Jun 2014 17:48:02 +0800
Tag:    v2.4.11

MDL-46148 qtype_calculated: fix formula validation.