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/internal/Workbench.java
if (context != null) {
			EHandlerService hs = (EHandlerService) context.get(EHandlerService.class.getName());
			EList<MHandler> handlers = part.getHandlers();
			for (MHandler handler : handlers) {
				String commandId = handler.getCommand().getId();
				if (handler.getObject() == null) {
					handler.setObject(contributionFactory.create(handler.getURI(), context));
				}
				hs.activateHandler(commandId, handler.getObject());
			}
		}
		EList<MPart<?>> children = part.getChildren();
		for (MPart<?> child : children) {
			processHandlers((MPart<MPart<?>>) child);
		}
	}
	/**
	 * Initialize a part renderer from the extension point.
	 * 
	 * @param registry
	 *            the registry for the EP
	 * @param r
	 *            the created renderer
	 * @param context
	 *            the context for the part factories
	 * @param f
	 *            the IContributionFactory already provided to <code>r</code>
	 */
	public static void initializeRenderer(IExtensionRegistry registry, PartRenderer r,
			IEclipseContext context, IContributionFactory f) {