Bug fix for HQ placement and moving printed rules into game

This update fixes a user-reported bug when HQ placement cannot be done because there are no spaces within 3 hexes of a friendly unit that are not also in an enemy unit's ZOI. Under the rules, the HQ should be able to be placed within 3 hexes of either entry point 'A' or 'I', depending upon which player is active, and the HQ can be placed in an enemy ZOC without penalty. This update implements this rule correctly.

The update also embeds the printed rules within the game so that Steam won't get stuck on "Stopping..." if the user has opened the printed rules and then exited the game. For users who would like to review the printed rules outside of the game, we've made them available in the Community Hub as a Guide.