Instant XP Gain

Fixed a bug where villagers couldn't apply discounts or increase prices.

Fixed a bug where it wasn't possible to get the achievement 'What a Deal!'

Fixed a bug where villagers couldn't interrupt a trade or restock an item.

Fixed a bug where the XP given to the player had a margin of error of 1 point.

Fixed a bug where villagers couldn't increase their level after a trade. (Thanks a lot krugf for the Report!)

Fixed a bug where the enderdragon dropped more XP than expected.

The mod is finally client-side too!