update readme
update readme

micschk/silverstripe-liveseo,jonom/silverstripe-seo,hubertusanton/silverstripe-seo,gordonbanderson/silverstripe-liveseo,micschk/silverstripe-liveseo,jonom/silverstripe-seo,gordonbanderson/silverstripe-liveseo,hubertusanton/silverstripe-seo