improved etcd watch support
improved etcd watch support

bacongobbler/confd,rancher/confd,bacongobbler/confd,blippar/confd,okushchenko/confd,kelseyhightower/confd,blippar/confd,rancher/confd,Fitbit/confd,okushchenko/confd,Fitbit/confd,kelseyhightower/confd