Persist instance across scenes.

Author: baldwin628

googleanalyticsv3.unitypackage

@@ -147,6 +147,9 @@ private void HandleException(string condition, string stackTrace, LogType type)
   private void InitializeTracker() {
     if (!initialized) {
       instance = this;
+
+      DontDestroyOnLoad(instance);
+
       Debug.Log("Initializing Google Analytics 0.1.");
 #if UNITY_ANDROID && !UNITY_EDITOR
       androidTracker.SetTrackingCode(androidTrackingCode);