Amqp-storm

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- Fixed bug causing messages without a body to not be consumed properly [16] - Thanks Adam Mills.

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- Fixed minor bug in the Poller error handling.
- Fixed issue where network corruption could caused a connection error to throw the wrong exception.

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- Fixed SSL bug that could trigger an exception when running multiple threads [14] - Thanks Adam Mills.
- Fixed bug when using channel.basic.get to retrieve large payloads.
- Reduced default RPC timeout from 360s to 120s.

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- Removed noisy logging.
- Fixed Runtime exception caused by listener trying to join itself [11] - Thanks ramonz.
- Channels are no longer closed after RabbitMQ throws a recoverable exception.
- Added Error mapping based on the AMQP 0.9.1 specifications (when applicable).
Introduced three new variables to the AMQPStorm Exceptions.
- error_code: This provides HTTP style error codes based on the AMQP Specification.
- error_type: This provides the full AMQP Error name; e.g. NO-ROUTE.
- documentation: This provides the official AMQP Specification documentation string.

These variables are available on all AMQPStorm exceptions, but if no error code was
provided by RabbitMQ, they will be empty.

Usage:
except AMQPChannelError as why:
if why.error_code == 312:
self.channel.queue.declare(queue_name)