update pod.json for new internal command and update router cmd descripti...

Updates for https://github.com/openshift/origin/pull/376, optional integration with e2e test to curl the route instead of direct to the pod.  Documentation update
I agree, it's ugly.  We can definitely pass the listen address via cmd options I just didn't have a nicer way of parsing `ip a` but that may have just been my bash-fu so I'm open to changing it if there is a better way.   Having a `status` command would be ideal.