Layout.
Make unbindQueue a true analogue of bindQueue and introduce unbindQueue' for bindQueue'.
Define unbindExchange and unbindExchange'.
update changelog
remove deprecation notices for exchangeAutoDelete and exchangeInternal

They apparently have been undeprecated by RabbitMQ so should be safe to use
Update comments

* Link to tutorials on rabbitmq.com
* Link to a protocol overview page
* The library implements 0-9-1 now
Merge pull request #13 from michaelklishin/patch-1

Update comments