Use always the same xml writer settings

VocaluxeLib/IBasic.cs

@@ -21,6 +21,7 @@ using System;
 using System.Collections.Generic;
 using System.Collections.ObjectModel;
 using System.Drawing;
+using System.Xml;
 using VocaluxeLib.Draw;
 using VocaluxeLib.Game;
 using VocaluxeLib.Menu;
@@ -54,6 +55,11 @@ namespace VocaluxeLib
 
         bool IsMicConfigured(int playerNr);
         int GetMaxNumMics();
+
+        /// <summary>
+        /// Get the uniform settings for writing XML files. ALWAYS use this!
+        /// </summary>
+        XmlWriterSettings GetXMLSettings();
     }
 
     public interface ISettings