title: Using cameraOverlayView with UIImagePickerController
body: <p>I have an app that uses the <code>UIImagePickerController</code> to take a picture. The problem is that I only want the camera option to be available and I understand that I need to hide the standard controls:</p>
  <pre><code>cameraUI.showsCameraControls=NO;
  </code></pre>
  <p>and use a <code>cameraOverlayView</code> to provide my own controls. I have had a look at Apple's <code>PhotoPicker</code> project already and my initial problem is how do I get an <code>Overlay</code> object onto my storyboard? I can't find such an object in the library.</p>