title: contentInset for QLPreviewController
body: <p>I am refactoring my app for iOS 7, i have a view controller with UIToolBar in the top and below that QLPreviewController.
  I set the UIToolBar translucent to YES and the origin y of the QLPreviewController is the same as the toolbar`s y origin (so i will be able to see the QLPreviewController behind the tool bar).</p>
  
  <p>Right now the content of the QLPreviewController is cut and i would like to set the content inset to begin at 44.0 (toolbar's height) and not 0.0.</p>
  
  <p>screenshot:
  <img src="https://i.stack.imgur.com/89JFf.png" alt="enter image description here"></p>
  
  <p>Can i access the QLPreviewController`s ScrollView?
  How do i do it?</p>
  
  <p>Thanks !</p>