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 (o instanceof MContributedPart<?>) {
					mainContext.set(IServiceConstants.ACTIVE_PART_ID, ((MContributedPart<?>) o)
							.getId());
				}
			}
			/*
			 * For debugging purposes only
			 */
			@Override
			public String toString() {
				return IServiceConstants.ACTIVE_PART_ID;
			}
		});
		
		
		mainContext.set(IExceptionHandler.class.getName(), exceptionHandler);
		mainContext.set(IExtensionRegistry.class.getName(), registry);
		mainContext.set(IServiceConstants.SELECTION, new ActiveChildOutputFunction(
				IServiceConstants.SELECTION));
		mainContext.set(IServiceConstants.INPUT, new ContextFunction() {
			public Object compute(IEclipseContext context, Object[] arguments) {
				Class adapterType = null;
				if (arguments.length > 0 && arguments[0] instanceof Class) {
					adapterType = (Class) arguments[0];
				}
				Object newInput = null;
				Object newValue = mainContext.get(IServiceConstants.SELECTION);
				if (adapterType == null || adapterType.isInstance(newValue)) {
					newInput = newValue;
				} else if (newValue != null && adapterType != null) {