title: Resize NSWindows with easing animation
body: <p>I'm trying to resize an NSWindow (the main one) with a nice easing animation (EaseOut).</p>
  
  <p>I can use the <code>[NSWindow animator]</code> but I havn't found a way to add the easing effect.</p>
  
  <p>Do you have an idea or code sample which can help me to do that?</p>