title: SWIFT code dataWithContentsOfFile broken with update to XCode 6.1
body: <p>Ever since the latest update to XCode the following two lines of codes have compile errors. Can anybody please advice me on the adjustments I need to make to get the program to compile and run again?</p>
  
  <pre><code>        var sceneData = NSData.dataWithContentsOfFile(path, options: .DataReadingMappedIfSafe, error: nil)
          var archiver = NSKeyedUnarchiver(forReadingWithData: sceneData) archiver.setClass(self.classForKeyedUnarchiver(), forClassName: "SKScene")
  </code></pre>
  
  <p>Any help would be appreciated, thank you.</p>