Changes to Racecards Big Races

added the optional property racecards/items/prize_currency to the response with the 200 status

response property racecards/items/runners/items/quotes deprecated

response property racecards/items/runners/items/rpr deprecated

response property racecards/items/runners/items/spotlight deprecated

response property racecards/items/runners/items/stable_tour deprecated

response property racecards/items/runners/items/ts deprecated