Merge new treasure-play mode
Revert "Merge new treasure-play mode"

This reverts commit 72015300eeded25acb0d524519f04cb8855fe052.
Play treasures WIP
Update for new treasure playing mode
Simplify computeMaximumPurchaseCost
Add Nobles
Add Swindler
Add Ironworks
Add Baron
Add Conspirator
Docs, small eventStack refactoring
Fix swindler bug
Add Upgrade