Forty-One: Add new 'positive' mode (default on).
Forty-One: Add new 'positive' mode (default on).

This requires that a winning team have positive scores on both sides,
so one partner can't just incessantly underbid and toss every trick
the other player's way.  It's on by default but you can turn it off
for unbalanced funtimes.

sunfall/giles