Git commits in Moodle 2.4.7 by Sam Chaffee

commit ce5a85c35416a85a6f1b773159a03798acdbf9bc
Author: Sam Chaffee <sam@moodlerooms.com>
Date:   Tue, 08 Oct 2013 02:33:52 +0800
Tag:    v2.4.7

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


commit e8ec840f3ccf5cd4d74768ca103e9937feec133a
Author: Sam Chaffee <sam@moodlerooms.com>
Date:   Tue, 01 Oct 2013 04:34:18 +0800
Tag:    v2.4.7

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