networker skeleton

worker: networker skeleton

This RP is a skeleton for the future networker based on StringsWorker

Continue of work from: https://github.com/juju/juju/pull/86
After looking at what net.Interfaces() return (and also net.InterfaceByName()), you might be able to do the check without calling netstat or anything - just check the net.Interface.Flags and addresses if needed.