AMQP-CPP 2.6.0

• Added connection::maxFrame() and connection::expected() methods to give hints about the amount of data that the connection::parse() method ideally expects.
• Added consistent-hash exchange.
• Added tcpinbuffer with much less allocation.
• Removed tcpbuffer and replaced it with a tcpoutbuffer.
• Fixed issues that caused reading data to be broken.
• Fixed reallocation bug.
• Only allocate a message and its data when a consumer wants to and allow consumers to receive the individual parts.
• Copied the methods to both implementations so they can return their concrete type.
• Fix missing include "includes.h" for deferredconsumerbase.cpp.
• Fix for crashes when receiving a message due to memory corruption crashes due to the wrong way using aligned_storage.
• Some portability fixes for Solaris-like systems.