Upgraded original RothenburgAR to Unity version 2017.4.5f1 (and upgrading from standalone vuforia to the version integrated in unity)

Assets/RothenburgAR/Scripts/PointOfInterest/IPoiPreloader.cs

@@ -0,0 +1,8 @@
+namespace RothenburgAR.PointOfInterest
+{
+    public interface IPoiPreloader
+    {
+        bool CanLoadPoiDirectory(string poiDirectory);
+        PoiData PreloadPoi(string poiDirectory);
+    }
+}