Really 64

- SubscriptionManager
- SubscribeAggregator
- ObjectSubscriber
- Replayer
- GorillaCenter new subsxription handling
- All the Gorilla wiring
- JSON parsing fix
- WIP of Unsubscribe handling
I think that `SubscriptionFailure` should be renamed to `SubscriptionTerminated` and return it only in cases of the current subscription is terminated only not with any failure