Moving namespace so it's more discoverable

UseSubscriptionService should be discoverable.
Fixing spelling of Obsolete message

Fixes #187
Test RabbitMQ Control Bus Bug

Adding test to illustrate issue with RabbitMQ Control Bus subcriptions
Passing Subscription Address into Binder

At the moment the Binder assumes the subscription is on the data bus,
but could be on the control bus.
Using Newtonsoft directly now.