fix folder structure

Pilz.Updating.Administration/Packaging/UpdatePackageTemplate.cs

@@ -0,0 +1,10 @@
+using System.Collections.Generic;
+
+namespace Pilz.Updating.Administration.Packaging
+{
+    public class UpdatePackageTemplate
+    {
+        public string FilesToCopyPath { get; set; }
+        public List<string> UpdateInstallerAddOns { get; set; } = new List<string>();
+    }
+}