Make events&trades with booster court/jersey/couch

Hi EA. 

Make events with skill boosting court/jersey/couch instead of players.

Also you may add trades where silver players could be traded too. For example, 50 silver players are traded to yellow booster court, 100 silver players - to red booster court. Same about jerseys and couches.

THAT IS SIMPLE.

Also could trade yellow booster items to red booster. For example, 5 to 1.