IDEA formatting
Making all_servers private
Create top-level configurations called services.

Services are standalone servers (like NeverListen) which can be started or stopped without additional dependencies.  Behaviors are an internal detail; an implementation strategy that are handed to a BehaviorServer.

Rename BehaviorRepository to ServiceMaker.
Return all Services including Behaviors.

Make ServiceMaker#all_service_names (renamed from all_server_names) to include both services and behaviors.
Fix broken name in NeverListen service.

Services are standalone servers (like NeverListen) which can be started or stopped without additional dependencies.  Behaviors are an internal detail; an implementation strategy that are handed to a BehaviorServer.

Rename BehaviorRepository to ServiceMaker.