NUM-115 Organized imports
NUM-115 Only convert Channel#queueDeclare arguments if it's not null to avoid exceptions
NUM-115 Fixed a NPE in Channel#basicPublish
NUM-115 Default message delivery mode set to 1 (non-persistent) instead of 0 which doesn't exist
NUM-115 Fixed a bug where a new blocking message consumer was created every call
NUM-115 Fixed NPE by converting null to ints
NUM-115 Added a factory to create AmqpDriver instances
NUM-115 AmqpGuardingActor written
NUM-115 AkkaMessageConsumer written