Changelog:
Adds:
- Inventory and chests use the new user interface engine
- Take all, sort, stack, and "put the same items" options added to chests
- Save is now async, so it should no longer freeze the game
- Automatic world backup system
- You can stop fire with the sword
- After an error screen, you can return to titlescreen with Esc

Fix:
- Shadow armor reworked
- Small windmills can crash the game
- Random crash when loading a world should be fixed
- Random crash when you quit the game should be fixed
- Sometimes, the jungle background appears when you load a world

Changes:
- Big rework and refactoring of the internal engine