Auto-reset option

[MarkTraceur]

We already have a heuristic described for resetting (when HC gain/hr is consistently lower each time), so why not codify it? Turn it off by default, and come up with a simple first-pass algo for determining that it's going down consistently. I'd say if it goes 10 times without reaching a new high, it's time to reset, but I could go with more research.

[MarkTraceur]

Corollary: It may be worthwhile to continue gaining HCs later in the game, even as the rate descends, rather than spend the time it takes to get back up to peak production rate. That should probably be included in the calculation.