Git commits in Moodle 2.6.4 by Ankit Agarwal

commit 72d8a0a12ed8f1f53f6ede4f591eea04cb204ac6
Author: Ankit Agarwal <ankit@moodle.com>
Date:   Thu, 10 Jul 2014 17:44:59 +0800
Tag:    v2.6.4

MDL-46148 qtype_calculated: low-level defence against bad formulas

commit 90db0fb726586d71767db433bd8b06dd9d2217f4
Author: Ankit Agarwal <ankit@moodle.com>
Date:   Wed, 18 Jun 2014 15:40:31 +0800
Tag:    v2.6.4

MDL-39883 events: Trigger a module created event when duplicating a module

commit fd554631f8a4efaf19bcd4587f59e536ce59cb2d
Author: Ankit Agarwal <ankit@moodle.com>
Date:   Wed, 18 Jun 2014 15:39:02 +0800
Tag:    v2.6.4

MDL-39883 events: Create a new api create_from_cm for module create event

commit 1b308f725a01d06a1fef3ef7fcb0b4848c78bc51
Author: Ankit Agarwal <ankit@moodle.com>
Date:   Mon, 26 May 2014 10:39:57 +0800
Tag:    v2.6.4

MDL-33763 notes: Fix issue with incorrect node highlighting in the nav tree