eliminating the ServiceHub concept and forgetting that we tried that horrible idea
put the subscription spin up into Subscriptions
FubuTransportRegistry.NodeName setter
Subscriptions.ReplyNodeFor
MessageInvoker does not run replies through the handler graph
ServiceBus mechanics for request/reply
EnvelopeSender and Envelope are respecting the Request/Reply mechanics
KABOOM!  Look who can do request/reply end to end?