title: Core Motion not working in Xcode 7 Swift 2.0
body: <p>I get no output from Core Motion regardless I use pull or push method. I'm using Xcode 7.0 beta 6 with Swift 2.0 on iPhone 4s iOS 8.4.</p>
  
  <pre><code>    let manager = CMMotionManager()
  
      manager.accelerometerUpdateInterval = 0.3
      manager.startAccelerometerUpdates()
      print(manager.accelerometerData?.acceleration.x)
  
      manager.accelerometerUpdateInterval = 0.3
      manager.startAccelerometerUpdatesToQueue(NSOperationQueue()) { (data: CMAccelerometerData?, error: NSError?) in
          guard data != nil else {
              print("There was an error: \(error)")
              return
          }
         print(data!.acceleration.x)
      }
  </code></pre>
  
  <p>Anybody knows what I'm doing wrong? Thanks.</p>