Smelting Update

Smelting plugin updated. As it required a config change, the new specs are: Small furnaces convert 4 ore per second with a payout of 200 product (1:50 ratio), electric furnaces convert about 6 ore per second with 300 payout, large furnaces convert 8 ore per second with 400 payout. As such, large furnaces consume double the wood as well and produce more charcoal. Charcoal chance has also been increased to always produce 10 charcoal per 1 wood consumed. This should reduce the ore consumption speed but increase the payout slightly from before.