Bug 49117 [Plan Item] Workbench needs hooks for new welcome support
M6 We need to provide an extension point and some interfaces to allow for a primary feature to declare a welcome page. This extension point will be tied the new IProduct being defined by the Core team and needs to have 3 states 1) Fill whole screen 2) Collapsed on the right when the user selects something and starts working 3) Disables when it is no longer of any use
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/ide/IDEWorkbenchAdvisor.java
exceptionHandler = new IDEExceptionHandler(configurer);
		
		
		WorkbenchAdapterBuilder.registerAdapters();
		
		
		ResourcesPlugin.getWorkspace().addResourceChangeListener(
			getShowTasksChangeListener(),
			IResourceChangeEvent.POST_CHANGE);
		
		String[] cmdLineArgs = Platform.getCommandLineArgs();
		 
		
		for (int i = 0; i < cmdLineArgs.length; i++) {
			if ("-showlocation".equalsIgnoreCase(cmdLineArgs[i])) { 
				workspaceLocation = Platform.getLocation().toOSString();
				break;
			}
		}
		
		declareWorkbenchImages();
		
		
		activityHelper = IDEWorkbenchActivityHelper.getInstance();
	}
	/* (non-Javadoc)
	 * @see org.eclipse.ui.application.WorkbenchAdvisor#preStartup()
	 */
	public void preStartup() {