Git commits in Moodle 2.4.x by Steve Bader

commit 8460efc65b9a5a320fda9a4e703c52bc04408e07
Author: Steve Bader <smbader@ncsu.edu>
Date:   Fri, 02 Aug 2013 13:54:58 +0800
Tag:    v2.4.6

MDL-30852 grade report: Add aria attributes

commit 27e3057838841d2a54e12ddd483f0d1e1234dfd7
Author: Steve Bader <smbader@ncsu.dot.edu>
Date:   Fri, 02 Nov 2012 05:58:14 +0800
Tag:    v2.4.0-beta

MDL-30921 navigation: Added aria-role to the navbar content