Add mapgen_stair_cobble to minetest_game
Use 6d facedir to place upside down slabs and stairs
Longer range and insta-dig in creative
Add mapgen_stair_cobble to minetest_game
Use 6d facedir to place upside down slabs and stairs
Longer range and insta-dig in creative
Merge remote-tracking branch 'upstream/master' into weather