update register package in preparation for registers of other types than local Agents; e.g., against a shared persistence store or shared cache
fixed factory issues across context and cluster factories
integrated into DomainModel with supervisor startup
removed AggregateRootRef in favor of regular ActorRef
initial code complete on register subsystem; need to test! existing unit tests work however clustered demo does not.
initial test for register startup
refactored to pull up constituency for better modeling and testability