GH #102 - Don't move messages around if there are no consumers.
GH #191 - Working on pub/sub callbacks.
GH #191 - Use HTTP outconns as callbacks.
GH #191 - Working on callbacks.
GH #191 - Refactoring, http_soap_id -> callback_id.
Merge branch 'master' into dsuch-f-gh191-pubsub-callbacks-http-outconns
GH #191 - Use outconns instead of inline callbacks.
Merge branch 'dsuch-f-gh191-pubsub-callbacks-http-outconns'