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
disableAutoBuild();
		
		
		initializeFeatureSets();
		Set s = getNewlyAddedFeatures();
		welcomePerspectiveInfos = new ArrayList(s.size());
		for (Iterator it = s.iterator(); it.hasNext(); ) {
			String versionedId = (String) it.next();
			String featureId = versionedId.substring(0, versionedId.indexOf(':'));
			String featureVersionId = versionedId.substring(versionedId.indexOf(':')+1);
			AboutInfo info = AboutInfo.readFeatureInfo(featureId, featureVersionId, featureId);
			if (info != null && info.getWelcomePerspectiveId() != null && info.getWelcomePageURL() != null) {
				welcomePerspectiveInfos.add(info);
			}
		}
	}
	/* (non-Javadoc)
	 * @see org.eclipse.ui.application.WorkbenchAdvisor#postStartup()
	 */
	public void postStartup() {
		refreshFromLocal();
		enableAutoBuild();
		try {
			openWelcomeEditors();
		} catch (WorkbenchException e) {
			IDEWorkbenchPlugin.log("Fail to open remaining welcome editors.", e.getStatus()); 
		}
		checkUpdates();
	}
	/* (non-Javadoc)