v0.1.0

This is the big one.

Worldmaps are here!

Worldmaps have been added into STC. This makes it possible to revisit levels you have completed.

World 1's worldmap is fully complete.
Not all worldmap features from SuperTux (i.e. Teleporters) work yet - they will need to be implemented to add Bonus Island I and II.

The way save files are saved and loaded has also changed to accommodate world maps, so previous save files will no longer work with this update. You will need to create a new save file.