Git commits in Moodle 2.4.8 by Andrew Davis

commit c8d061208d5b0d4d3bd4f8ef36190a8d8bfcecb2
Author: Andrew Davis <andrew@moodle.com>
Date:   Fri, 22 Feb 2013 10:37:57 +0800
Tag:    v2.4.8

MDL-43188 core_message:reimplemented the beep on new message functionality from 1.9