Trading Interface — Shop GUI 2.0.0

WARNING! Please backup buyList.yml, sellList.yml and customItemNames.yml from the plugin's data folder before installing this update.
NOTE! Starting with version 2.0.0 the plugin depends on DbLib.

- Added support for items with enchantments, custom names and lores
- Temporary discounts, which expire after a set time
- Revamped interface

NOTE! Starting with version 2.0.0 the plugin stores items in a database. When you first launch the server after the plugin's update, .yml config files will be converted into the database format and deleted. Existing discounts will remain eternal after the conversion, but you will not be able to create eternal discounts anymore.

- Fixed the bug which allowed to receive free money by selecting an item to sell and dropping it during transition between windows;
- Added Chinese translation (thanks to Anders233).

- Fixed money not adding after selling an item.

Fixed an error, which appeard when player responded to a form created by another plugin.