Bug 283442 [UI] Refactor the rendering class names
In order to bring the model closer to the way in which we talk about it we should re-factor it to remove references to 'factory'. For now the re-factoring will to replace 'PartRenderer' with 'PartRenderingEngine' and to replace '<xxx>Factory' with '<xxx>Renderer'. Post 0.9 we expect to change these again but this will make the initial story clearer.
bundles/org.eclipse.e4.ui.workbench/src/org/eclipse/e4/workbench/ui/renderers/PartRenderer.java
PartFactory parentFactory = parent != null ? getFactoryFor(parent) : null;
				if (parentFactory == null)
					return;
				if (changedPart.isVisible()) {
					Activator.trace(Policy.DEBUG_RENDERER, "visible -> true", null); 
					
					createGui(changedPart);
				} else {
					Activator.trace(Policy.DEBUG_RENDERER, "visible -> false", null); 
					
					removeGui(changedPart);
				}
			}
		}
	};
	private AdapterImpl childrenListener = new AdapterImpl() {
		@Override
		public void notifyChanged(Notification msg) {
			if (ApplicationPackage.Literals.MPART__CHILDREN.equals(msg.getFeature())) {
				MPart<?> changedPart = (MPart<?>) msg.getNotifier();
				PartFactory factory = getFactoryFor(changedPart);
				
				if (factory == null)
					return;
				if (msg.getEventType() == Notification.ADD) {
					Activator.trace(Policy.DEBUG_RENDERER, "Child Added", null); 
					MPart added = (MPart) msg.getNewValue();
					
					
					if (!added.isVisible()) {