The InventoryMoveItemEvent is now only used for Hopper Minecarts, other blocks that could move items (Hoppers and Droppers) are checked on place. That way players that have access to a shop can just use the blocks normally but other players can't place them.
This includes a new price_precision config entry to set the amount of decimal places to allow on a shop sign (set to 2 by default). Thanks to @andrewkm for this idea.
It also fixes an issue where a zero inside the decimal places was removed instead of it's end and also removes the point and zeros from prices that only have trailing zeros to avoid confusion (e.g. in languages that use the decimal point for thousands)
This is necessary so that we still store the messages with the & code internally as they would get saved back to the config file using the converted color code (section sign) which could lead to encoding issues on different operating systems. (It also fixes issues with strings that contain an and sign that isn't supposed to be a color code) Instead we load the real string and color messages via the prefix method which should get called in every instance where a message is send.
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.
This should fix issues with how name changes are handled and also prevent short names of different players from clashing. It also uses guava caches instead of maps now with a configurable cache size
