         // Set translucent. (Default value is already true, so this can be removed if desired.)
         UINavigationBar.appearance().translucent = true
 
-//        let tabBarStoryboard = UIStoryboard(name: "TabScreens", bundle: nil)
-//        let tabBarScreen = tabBarStoryboard.instantiateViewControllerWithIdentifier("TabBarController")
-//        mainViewController = tabBarScreen
+        let tabBarStoryboard = UIStoryboard(name: "TabScreens", bundle: nil)
+        let tabBarScreen = tabBarStoryboard.instantiateViewControllerWithIdentifier("TabBarController")
+        mainViewController = tabBarScreen
         
-        mainViewController = IntroViewController(nibName: nil, bundle: nil)
+//        mainViewController = IntroViewController(nibName: nil, bundle: nil)
         let navController  = UINavigationController(rootViewController: mainViewController)
 
         window?.rootViewController = navController

    }

    func applicationWillEnterForeground(application: UIApplication) {
        mainViewController.fetchRecentSamples()
    }

    func applicationDidBecomeActive(application: UIApplication) {

class AppDelegate: UIResponder, UIApplicationDelegate {

    var window: UIWindow?
    var mainViewController: UIViewController!

    func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool
    {
