         scrollView.backgroundColor = UIColor.blackColor()
         self.view.addSubview(scrollView)
 
-        let yosemiteImage = UIImage(named: "Yosemite")
+        let yosemiteImage = UIImage(named: "Yosemite")!
         let backgroundImageView = UIImageView(image: yosemiteImage)
         scrollView.addSubview(backgroundImageView)
 

    }

    private func tintedIconButton(iconNamed iconName: String) -> UIButton {
        let iconImage = UIImage(named: iconName).imageWithRenderingMode(.AlwaysTemplate)
        let borderImage = UIImage(named: "ButtonRoundRect").imageWithRenderingMode(.AlwaysTemplate)

        let button = UIButton(frame: CGRect(origin: CGPointZero, size: borderImage.size))
        button.setBackgroundImage(borderImage, forState: .Normal)

        statusBar.superview!.insertSubview(statusBarBlurView, belowSubview: statusBar)
        self.view.addSubview(statusBarBlurView)

        let statusBarBackgroundImage = UIImage(named: "MaskPixel")!.imageWithRenderingMode(.AlwaysTemplate)
        let statusBarBackgroundView = UIImageView(image: statusBarBackgroundImage)
        statusBarBackgroundView.frame = statusBarVibrancyView.bounds
        statusBarBackgroundView.autoresizingMask = .FlexibleWidth | .FlexibleHeight
