Falkers Art Deco

- added furnace and barrel
- added blackstone set (15 models)
   - normal, polished, bricks, cracked, chiseled and gilded
   - separate textures for stairs, slabs, walls, plates and buttons
   - buttons come with new custom model
- added copper set (20 models)
   - normal and cut
   - separate textures for stairs, slabs and double slabs
   - same for exposed, weathered and oxidized versions
- added brick set (5 models)
   - separate textures for stairs, slabs, double slabs and walls
- fixed white border on some oak plank textures