ShoppingMall starting board generator

[trevorld]

• http://www.ludism.org/ppwiki/ShoppingMall

• Request of @tinfoilhatter

• Official version uses "nickels" and "pennies" although we may wish to use instead the "go" stones or the (small) "checkers"

  • Add a unique "rank" to each of the "currency" so that if we were to use something like "numbered" go stone configuration that shows rank we could easily identify each "currency" coin

• Doing a demo game may require completion of #56

[trevorld]

• This was mainly achieved in https://github.com/piecepackr/ppgames/commit/a9bcf98830889f138c037998258115cec8d0df9d
• Instead of coins we use colored stones...