Market Yard :
this will be a market building.... where player can buy/sell resources (Coins & Elixir).
rules :
1) max amount player can sell is 60% of total storage amount.
2) max amount player can buy will amount required to full storage.
3) player can decide resource value. eg if player wants to sell elixir he can decide for coins per elixir value.
like 1 elixir for 5 coins/10 coins..
