Quark r1.2-91

For example, JEI claims that 2 stacks of 6 prismarine slabs make a block, likewise 6 stacks of 6 slabs make 4 stairs. This seems to be repeated for almost any recipe where the slabs don't produce a different block (e.g., chiseled sandstone). When actually putting slabs or stairs in the crafting table, a normal layout produces the expected results.