Fix RegionListener with Windows

BauSystem_Main/src/de/steamwar/bausystem/world/RegionListener.java

@@ -91,7 +91,7 @@ public class RegionListener implements Listener {
         Sign sign = (Sign) event.getClickedBlock().getState();
         String[] lines = sign.getLines();
         for (int i = 0; i < lines.length; i++) {
-            sign.setLine(i, lines[i].replace('§', '&'));
+            sign.setLine(i, lines[i].replace('\u00A7' /* WINDOWS \u00A7 -> § */, '&'));
         }
         sign.update();