Fix a typo, make it use HSV at all times.

region_colors.php

@@ -8,7 +8,7 @@
 $input_file = $argv[1];
 
 $detector = new NudeDetector($input_file, 'HSV');
-echo "map sking pixels\n";
+echo "map skin pixels\n";
 $detector->map_skin_pixels();
 echo "determine regions\n";
 $detector->determine_regions();