update README replacing "mcclient" by "dockercraft"
update README replacing "mcclient" by "dockercraft"

docker/dockercraft,johnmccabe/dockercraft,nyasukun/openstackcraft,stevesloka/kubecraft,stevesloka/kubecraft,johnmccabe/dockercraft,nyasukun/openstackcraft,nyasukun/openstackcraft,gdevillele/dockercraft,docker/dockercraft,gdevillele/dockercraft,johnmccabe/dockercraft,stevesloka/kubecraft,gdevillele/dockercraft