plume: add new release utility
plume: add new release utility

dm0-/mantle,quantum/coreos-mantle,mjg59/mantle,glevand/coreos--mantle,mischief/mantle,marineam/mantle,quantum/coreos-mantle,glevand/coreos--mantle,dm0-/mantle,mischief/mantle,pbx0/mantle,mjg59/mantle,crawford/mantle,marineam/mantle