Crossroads, Conspirator, and Grand Market specs should reference the Turn through the game.current_turn association
Shared context for the Market Square card
Shared context for the Urchin card
Shared context for the Moat cards, and the reaction cards defined in the CardPlayer service
Peddler#cost requires the Turn as the second parameter
Refactor Grand Market spec

Lines are already handled by a shared context
Spoils' supply attribute should be false
Remove no longer used association

Update where the old association is still being used with the correct association reference