1x bugfix + auto close feature

This release contains support for RabbitMq AutoClose functionality. By setting AutCloseConnection in the the RawRabbitConfiguration object, a connection will be closed when the last channel is closed.

The DefaultStrategy for when unhanded exceptions are thrown in the message handler now looks if the consumer has set NoAck to true, and in that case doesn't try to Nack the message. Nacking a message that is delivered as NoAck caused the consumer to be shut down by RabbitMq.