Added CONTRIBUTING.md
Added CONTRIBUTING.md

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