Git commits in Moodle 2.4.0 by Sam Chaffee

commit a66e8bb3aa22f0b6fdfbc29c64487576ae23a3f0
Author: Sam Chaffee <sam@moodlerooms.com>
Date:   Fri, 13 Apr 2012 04:57:52 +0800
Tag:    v2.4.0-beta

MDL-17444: Backup hooks for local plugin