Really 64

- SubscriptionManager
- SubscribeAggregator
- ObjectSubscriber
- Replayer
- GorillaCenter new subsxription handling
- All the Gorilla wiring
- JSON parsing fix
- WIP of Unsubscribe handling
This is a protection for it and prevent any one from setting it, if you need that for testing, extend this actor in testing and define a getMethod that returns the value of this `var`