Wilderness bug fix and update of rules to latest Civil War Heritage Series

This patch fixes a bug in the Wilderness scenario that would cause the 2nd player to move first in the movement phase and would mis-identify the active player on one prompt.

Also updates the rules to the latest version of the Civil War Heritage Series.

1. Cavalry Divisions cannot move into a hex that would force them to make a mandatory attack. Their opponent's moves, however, can create a mandatory attack situation for them. If this happens, the cavalry unit will be allowed to attack infantry to resolve the mandatory attack.

2. The exploding caissons result occurs even if the player did not use artillery for this combat.

3. Geographic victory may not be blocked by enemy units within 4 hexes of an entry hex. Previously, the rule was 5 hexes, but the game had a bug that extended it to 6.