public static void RemoveListener(KamcordCallbackInterface listener)
 {
     #if UNITY_IPHONE
     listeners.Remove(listener);
     #endif
 }
 // Call this static method to have your object receive all of the
 // KamcordCallbackInterface callbacks.
 public static void AddListener(KamcordCallbackInterface listener)
 {
     #if UNITY_IPHONE
     if (!listeners.Contains(listener))
     {
         listeners.Add(listener);
     }
     #endif
 }