Simply process manager subscription/unsubscription.
Make OrderPreservingAck more generic in regard to ack handling.
More unique persistence id for AggregateActor.
Better region names.
Better type parameters for AggregateActor.
Add CommandDistributor. Change command handling in AggregateActor in course.
Written rough spec for process manager actor.
Start to rework the process manager infrastructure. The init events are now directly from the aggregate actor and subscription will no longer use pubSub but also direct connections to the aggregates.