We deploy using the DeploymentState model now.
Also we now respond by patching the DeploymentState which is much nicer.

Closes #3

Also removes the RoutingKey / Exchange hack.

Also deprecates using deployment per service

Also adds logging if the script did not add UserCredentialStates. In
that case the client generates them based on the state of the whole
script execution.

This will make the translation towards using the real script output
easier

This will make the state tracking at the backend much easier

For the future we need an interface change for the scripts so they can
inform us what states the credentials have after the script run

Use default values for fetch_interval and reconnect_timeout

Bind to both group and non-group services at the services exchange