Fix marker position logic and zoom range calculation on Kzed and Flat

src/main/java/org/dynmap/flat/FlatMap.java

@@ -536,6 +536,7 @@ public class FlatMap extends MapType {
         s(o, "backgroundnight", c.getString("backgroundnight"));
         s(o, "bigmap", this.isBigWorldMap(world));
         s(o, "mapzoomin", c.getInteger("mapzoomin", 3));
+        s(o, "mapzoomout", world.getExtraZoomOutLevels());
         s(o, "compassview", "S");   /* Always from south */
         a(worldObject, "maps", o);
     }