Add shader option to disable biome shading, disable biome shading on non-normal worlds

src/main/java/org/dynmap/utils/MapChunkCache.java

@@ -96,4 +96,8 @@ public interface MapChunkCache {
      * Set autogenerate - must be done after at least one visible range has been set
      */
     public void setAutoGenerateVisbileRanges(DynmapWorld.AutoGenerateOption do_generate);
+    /**
+     * Get world
+     */
+    public World getWorld();
 }