Log message

Improving functionality of multicast delegate.  Now works more like the
NSNotificationCenter.  Removing a delegate within a delegate callback no longer
causes problems.  Adding a delegate during a delegate callback no longer results
in an inappropriate call to that new delegate.  (Just like NSNotificationCenter,
and multicast delegates in other languages.)

	Modify	/trunk/ChatController.h	diff
	Modify	/trunk/ChatController.m	diff
	Modify	/trunk/ChatWindowManager.m	diff
	Add	/trunk/MulticastDelegate.h	diff
	Add	/trunk/MulticastDelegate.m	diff
	Modify	/trunk/XMPPClient.h	diff
	Modify	/trunk/XMPPClient.m	diff
	Modify	/trunk/XMPPStream.xcodeproj/project.pbxproj	diff
	Modify	/trunk/XMPPStream.xcodeproj/robbie.mode1v3	diff
	Modify	/trunk/XMPPStream.xcodeproj/robbie.pbxuser	diff