Bug fix for the map's "outside" property that wasn't handled properly.

Added support for the new "colorfilter" map property. Due to Java2D
having no correct color filter support, only the "blackXX" values can be
previwed. "bw" and "invert" cannot, the performance cost was simply way
too high.

hacked-libtiled/tiled/util/TileCutter.java

@@ -48,7 +48,7 @@ public interface TileCutter
      * @return the next tile image, or <code>null</code> when no more tile
      *         images are available
      */
-    public Image getNextTile();
+    public BufferedImage getNextTile();
 
     /**
      * Resets the tile cutter so that the next call to <code>getNextTile</code>