[XCL][0.21] Cock Roulette: Up the Stakes 1.0.0

This mod makes several changes to the "Cock Roulette" game in X-Change.life.

1. The difficulty, cost, and rewards/penalties ramp up with every play, up to a maximum of 5x.
   1. Cost: difficulty * $100
   2. Cash prize: difficulty * $200
   3. (win) masc gain: difficulty * 2    (Instead of the old flat 5)
   4. (lose) masc loss: difficulty * 1
   5. (lose) ident loss: difficulty * 1
2. Whether you win or lose, you also get entered in an 'extra prize' drawing, once per difficulty level. You have a 20% chance per try to succeed, and can succeed multiple times. The 'prize' depends on player gender and whether you won or lost cock roulette.
   1. (male, lose) -1 to a random penis stat.
   2. (male, win) +1 to a random penis stat.
   3. (female, lose) -1 to pregnancy chance
   4. (female, win) +1 to pregnancy chance
   5. (The pregnancy chance bonus applies to all purchasable pill types. You can't reduce pregnancy chance below the base values for a pill.)