makes all smelting recipes take 1 ingredient to smelt, so that your furnaces don't get clogged when using mixed belts

in space-age, it's handy for doing mixed quality steel smelting

reduces probability of getting output and crafting time to compensate for the lower cost

in vanilla, that means:
- iron and copper smelting are unchanged
- steel smelting costs 1 iron, 20% chance of producing steel
- stone brick costs 1 stone, 50% chance of producing brick

compatibility note: any recipe that works in any "furnace" will be modified
that includes things like deadlock's stacking, or krastorio's crusher

this mod also (optionally) reverts K2's basic furnaces:
- they automatically select a recipe
- coke is removed from steel recipes
- coke is replaced with coal in other recipes