Really 64

- SubscriptionManager
- SubscribeAggregator
- ObjectSubscriber
- Replayer
- GorillaCenter new subsxription handling
- All the Gorilla wiring
- JSON parsing fix
- WIP of Unsubscribe handling
I think no need for this part as I see you only return successful subscriptions `r`, Assume that some subscriptions passes and some not, How you will return this error?. What if multiple subscriptions failed?