WIP: ip per service

This is filled with cruft, but I wanted to float the idea.  It actually works.

Overview:  When a service object is created, allocate it an IP.  Broadcast that IP to all kube-proxies.  Each one will set up iptables rules to forward traffic for that IP:port to a random local port.  Clients connect to a stable ip:port but no more port collisions!
I think this should be accomplished by creating the key ```/registry/serviceIPs/<IP Address>``` with the value of the key being (or at least containing) the service ID.