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.renderers.swt/src/org/eclipse/e4/workbench/ui/renderers/swt/LazyStackFactory.java
* behavior for processing the stack's contents to prevent all of the contents
 * from being rendered, calling 'childAdded' instead. This not only saves time
 * and SWT resources but is necessary in an IDE world where we must not
 * arbitrarily cause plug-in loading.
 * 
 */
public abstract class LazyStackFactory extends SWTPartFactory {
	public LazyStackFactory() {
		super();
	}
	public void postProcess(MPart<?> part) {
		if (!(part instanceof MStack))
			return;
		MStack stack = (MStack) part;
		MPart<?> selPart = stack.getActiveChild();
		
		if (selPart == null && stack.getChildren().size() > 0) {
			
			
			stack.setActiveChild((MItemPart<?>) part.getChildren().get(0));
		} else if (selPart != null && selPart.getWidget() == null) {
			renderer.createGui(selPart);
		}
	}
	@Override
	public <P extends MPart<?>> void processContents(MPart<P> me) {
		Widget parentWidget = getParentWidget(me);
		if (parentWidget == null)
			return;