compas_eve

`Message`	Message objects used for publishing and subscribing to/from topics.
`Topic`	A topic is like a mailbox where messages can be sent and received.
`Publisher`	Publisher for a specific topic.
`Subscriber`	Subscriber for a specific topic.
`EchoSubscriber`	Simple subscriber that prints received messages on the console (ie.
`Transport`	Defines the base interface for different transport implementations.
`InMemoryTransport`	In-Memory transport is ideal for simple single-process apps and testing.
`get_default_transport`	Retrieve the default transport implementation to be used system-wide.
`set_default_transport`	Assign a default transport implementation to be used system-wide.