updated readme
updated readme

openstack/poppy,stackforge/poppy,obulpathi/poppy,openstack/poppy,obulpathi/poppy,amitgandhinz/cdn,amitgandhinz/cdn,obulpathi/cdn1,obulpathi/poppy,obulpathi/cdn1,stackforge/poppy,openstack/poppy,stackforge/poppy