Gas Furnace: Comparator output based on temperature

[Erlend Åmdal]

Could be useful if the user intends to smelt at a specific temperature.

[Trent VanSlyke]

Errr.... Apparently the gas furnace already interacts with the comparator, using the inventory as the indicator instead of the furnace. I'd suggest retaining this behavior instead of switching to the temperature as output, to have parity with vanilla.

[Erlend Åmdal]

There is indeed already a comparator output based on the capacity of the furnace inventory. Because there is currently no reason to be interested in regulating the temperature of the gas furnace, I see no reason to change it just yet.