Release v0.7.0

Added

• Cluster Auto Discovery support (#39)

• request method when not passed a callback now returns a future that can be awaited for the result which would be the message. When passed a callback it still works asynchronously.

• request now uses a single async wildcard subscription for handling the responses

• Inboxes now use the NUID for the identifiers #41

Fixed

• Don't call error callback in read loop if connection was closed (#40) | thanks @brianshannan-wf

• Fixes not throwing away subscriptions on close and auto unsubscribe (116b6f6)

Changed

• New implementation of Request/Response, now less chatty over the network (#43)

• Each subscription now spawns a callback for processing the messages using a tornado queue to which the messages are buffered. (d65f470)
  The pending queue can be customized with new pending_msgs_limit and pending_bytes_limit options on subscribe. (defaults being 65536 and 65536*1024 respectively).
  When the tornado queue is full an async ErrSlowConsumer error is thrown to the error_handler if it is set