add Makefile with some common release operations
add Makefile with some common release operations

citrix-openstack-build/cliff,dtroyer/cliff,hguemar/cliff-tablib,idjaw/cliff,dhellmann/cliff-tablib,varunarya10/cliff,dreamhost/cliff-tablib,enzochiau/cliff,idjaw/cliff,dtroyer/cliff,citrix-openstack-build/cliff,openstack/cliff,varunarya10/cliff,enzochiau/cliff,openstack/cliff