This changes events to store the database Account instead of an OfflinePlayer and deprecates any event method that uses/returns OfflinePlayer. This is necessary as Bukkit#getOfflinePlayer(String) queries Mojang for the UUID when the user was not found in the local cache. As we already store this information (name to UUID mapping) in our database we should not have no need to rely on querying Mojang. (This might make transactions fail for shop owners that haven't played before but that shouldn't really be an issue in most cases)
This also fixes some conditions under which the STACK_TO_64 option did not get applied correctly and wrong inventory space checking for items with a max stack size of less than 64
Inspired by @Brokkonaut's fork this adds a new NOT_ENOUGH_SPACE_IN_YOUR_SHOP message to send to the shop owner when someone tries to sell to his shop. It also adds new %world, %x, %y and %z variables to display the shop's location in the message, adds a config option to make both the full-shop and out-of-stock messages respect /cstoggle and makes values in the locale.yml support ampersand color codes.
