Git commits in Moodle 2.6.0 by Sam Chaffee

commit 33ad01a291765551290ea2df99191c970b88247e
Author: Sam Chaffee <sam@moodlerooms.com>
Date:   Tue, 08 Oct 2013 02:33:52 +0800
Tag:    v2.6.0-rc1

MDL-40531 mod_lti: Changed namespace in XML to IMS LTI compliant

commit 87a26cc402419516a4c4bf1ee9c0ecc4fd69fee8
Author: Sam Chaffee <sam@moodlerooms.com>
Date:   Tue, 01 Oct 2013 05:27:03 +0800
Tag:    v2.6.0-beta

MDL-42065 core_grade: Modified some grade_item queries for improved performance

commit 41340f0461176fbc1aa81171042a3ce9166f706f
Author: Sam Chaffee <sam@moodlerooms.com>
Date:   Fri, 21 Jun 2013 03:54:03 +0800
Tag:    v2.6.0-beta

MDL-40258: Fixed invalid json string error in file-picker