Implementation for various types of message receivers

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	Class	Description
	AbstractMessageHandler	Abstract base class for regular message handlers where the message is simply passed to a method on the target instance.
	AbstractMessageReceiver	Abstract base class for all types of message receivers.
	AbstractMethodReceiver	Abstract base class for all message handlers where the message is handled by a method invocation on the target instance.
	AbstractTargetInstanceReceiver	Abstract base class for all types of message receivers that use an ObjectProvider for determining the target instance handling the message.
	CommandStatusFlag	A message target where a property value serves as a flag for indicating whether there is at least one active command matching the specified message type and selector.
	DefaultCommandObserver	Default implementation of the CommandObserver interface.
	DefaultCommandTarget	Default implementation of the CommandTarget interface.
	DefaultMessageErrorHandler	Default implementation of the MessageErrorHandler interface.
	DefaultMessageInterceptor	Default implementation of the MessageInterceptor interface.
	DynamicCommandProxy	A dynamic command is a special type of object that only gets created when a matching message was dispatched.
	MessageBinding	A message target where a property value of matching messages is bound to a property of the target instance.
	MessageHandler	A regular message handler where the message is simply passed to a method on the target instance.