AMQP stuff is now in good shape

AMQP stuff is now in good shape

We have:
- Automatic pings for rabbitmq consumers.
- Automatic pings for consumer-related event stores.
- When a store goes down, all the relevant consumers stop accepting
	messagges, since we must alwaysd be able to store an event.
- Automatic reconnections for failed consumers.
- Automatic reconnections for failed event stores.

Still needed, but will made later:
- RabbitMQ producer functionality.