title: NSWindow Mac App Store like Title Bar
body: <p>How could I make an <code>NSWindow</code>'s title bar look like that of the Mac App Store or of the app Feeder where it's height is increased and other controls are show in it.</p>
  
  <p>To see what I mean just check out the website for the Mac App Store : <a href="http://www.apple.com/mac/app-store/" rel="noreferrer">http://www.apple.com/mac/app-store/</a>.</p>
  
  <p>Is it a custom <code>NSWindow</code> or is it a completely borderless window with an <code>NSView</code> made to look like the title bar?</p>