title: How to use custom UIView subclass in XIB editor with Monotouch?
body: <p>I have added a XIB based <code>UIViewController</code> to my solution and dragged some <code>UIViews</code> into it.
  Now I want some of the views not to be <code>UIView</code> but <code>RoundedRectView</code> 
  (https://github.com/Krumelur/RoundedRectView) which inherits from <code>UIView</code>.</p>
  
  <p>How to achieve this? I tried to change the class in Interface Builder but that did nothing. Then I manually modified the designer.cs file but that resulted in a failure.
  Then I tried modifying the fake ObjC code but that failed too.</p>
  
  <p>(I'm using Xcode 4.2 and MD 2.8.6.4)</p>