Accessibility Fixes

See https://docs.google.com/a/okfn.org/spreadsheet/ccc?key=0AiYWJJQWWgSJdFpZX095V1RmS0hBaVhHZHJSWHNzdnc&userstoinvite=irina.bolychevsky@okfn.org#gid=0 for context