FR: Support production amplifcation

[sbrocket]

It'd be handy if Sankeyfactory could add support for the new Production Amplification feature that uses Somesloops, and which multiplies the output product without requiring increased inputs, at the cost of quadrupled (IIRC; should verify) power draw. UI could be as simple as a checkbox on the machine config screen, and it optionally could list the appropriate Somersloop cost which varies by building type as a helpful reference.