Oak and Ember Economy

Added config options:

• Enable/disable the market
• Enable/disable bidding

Made sure the config files go to a correct location.

Enable sorting the market entries.

Public API:

• com.oakandembermc.EconomyAPI
  • public static double getBalance(UUID userUUID)
  • public static void setBalance(UUID userUUID, double balance)
  • public static List getMarketEntries()

Fixed text display error in /pay command.