derive default layers, armor wearers, arms/chest pose flags and mob variant textures from the vanilla dump, drop the hardcoded lists

tools/BlockEntityTestRender.java

@@ -228,7 +228,7 @@ public class BlockEntityTestRender {
             log.info("rendered " + name);
         }
 
-        File outDir = new File("/home/elias/Dokumente/PixelPics-BlockEntity-Renders");
+        File outDir = new File(System.getProperty("out", "/home/elias/Dokumente/PixelPics-BlockEntity-Renders"));
         outDir.mkdirs();
         for (int i = 0; i < names.size(); i++) ImageIO.write(cells.get(i), "png", new File(outDir, names.get(i) + ".png"));