updated README
updated README

kwangkim/landslide,ionelmc/python-darkslide,netantho/epicslide,ionelmc/python-darkslide,ptisserand/landslide,adamzap/landslide,n1k0/landslide,exciteresearch/landslide,kwangkim/landslide,adamzap/landslide,ptisserand/landslide,kwangkim/landslide,exciteresearch/landslide,n1k0/landslide,netantho/epicslide,adamzap/landslide,ionelmc/python-darkslide,exciteresearch/landslide,ptisserand/landslide