Forbid copying and assignment in layout classes.

Specifically in:
 * BAbstractLayout
 * BAbstractLayoutItem
 * BGridLayout
 * BGridView
 * BGroupLayout
 * BGroupView
 * BLayout
 * BSplitView
 * BTwoDimensionalLayout

headers/os/interface/AbstractLayout.h

@@ -57,6 +57,10 @@ private:
 	virtual	void				_ReservedAbstractLayout9();
 	virtual	void				_ReservedAbstractLayout10();
 
+	// forbidden methods
+								BAbstractLayout(const BAbstractLayout&);
+			void				operator =(const BAbstractLayout&);
+
 			struct	Proxy;
 			struct	ViewProxy;
 			struct	DataProxy;