kontrol: initial support for postgress ltree extension
kontrol: move etcd functionality into etcd storage implementation
kontrol: make storage injectable from outside
kontrol: move all etcd functionality into etcd.go
kontrol/postgress: add a query to postgres ltree query converter
kontrol: remove k.Machines, storage is now responsible
kontrol/postgres: implement initial Get method for storage interface
kontrol/postgres: add error message for version constraint
kontrol/storage: add Update and rename Set to Add so we have more
control
kontrol/postgres: implement Update method for postgres
kontrol/postgres: add indexes for kite ltree field
kontrol/postgres: some improvements to prevent malformed inputs
kontrol/postgress: limit the idle and max open connection
kontrol/postgres: set back to a query
kontrol/postgres: randomize the result
kontrol/postgres: add support for version constraint