e2b74cc9e6
A bunch of FIXMEs in here, but it seems like a good start. Note that this differs from the original fake driver. Rather than the driver consuming each message in a greenthread, we leave it up to the choice of executor to determine how the consumer is run in parallel to the client and we use thread-safe queues to pass the messages and replies back and forth. The main reason for this is that we don't want the driver explicitly depending on eventlet.