New :
- New price system:
- A "desired price" will be calculated based on the quantity of item sold by the entire server.
- The actual price will naturally tend toward this desired price every hour, creating a smoother price fluctuation.
- Trader can now sells items.
- Every 24 hours the items will change.
- Only a single player can buy an item.
- thai translation by @mineopodev.

Bug fixes
- Fixed trader item blacklist not working.
- Savanna TOOLSMITH missing head.

Other
- Created ExoticTrades-API. This will be used for the map plugins.