[ARC] AMQPChannel is now ARC-based.
[ARC] AMQPConnection is now ARC-based.
[ARC] AMQPConsumer is now ARC-based.
[ARC] AMQPConsumerThread is now ARC-based. Removed useless lock queue.
[ARC] AMQPExchange and category are now ARC-based.
[ARC] AMQPMessage is now ARC-based.
[ARC] AMQPObject is now ARC-based.
[ARC] AMQPQueue is now ARC-based.
Used init CTX style.
Updated podspec (0.3.0ctx-ARC).
Removed unused RABBITMQ_DISPATCH_SOURCE_T_CAST_TO_CONST_VOID_STAR_ALLOWED define.
Re-added memory management for GCD queue in TTLManager.