title: "UIViewController subclass" does not appear in file template library for xcode 4.3
body: <p>I am fairly new to XCODE development currently following several tutorials.</p>
  
  <p>Bumped into an unexpected problem - looking for help!</p>
  
  <p>The problem is that the "UIViewController subclass" does not appear in the file template library.
  My book and every page I checked has this template under iOS or Mac "Cocoa touch" category.
  My xcode only shows "Objective-C Class" "Objective-C Category" "Objective-C Class Extension" "Objective-C protocol" "Objective-C Test Case Class" </p>
  
  <p>How can I add a new file template of UIViewController subclass ?</p>
  
  <p>My environments:
  - Snow Leopard
  - xcode version: 4.3</p>
  
  <p>Thanks in advance!</p>