Add more options to work with Scene Hierarchy (#23)

- Added option to group exported assets by node path in scene hierarchy
- Added field with node path to exported xml asset list

AssetStudio/AssetsManager.cs

@@ -30,6 +30,8 @@ namespace AssetStudio
                 {
                     ClassIDType.AssetBundle,
                     ClassIDType.ResourceManager,
+                    ClassIDType.GameObject,
+                    ClassIDType.Transform,
                 });
             }