v0.8.0 - Major Rework

The rewrite is finally available! As I explained in the previous devlog, I decided to rewrite the whole program from scratch.

I now have most of the groundwork done, including:

- Multithreading
- Dynamic LOD-levels

The brushes are now actually textures which are a lot faster to draw than to procedurally calculate circles all the time.

Exporting has been revamped to be more configurable and user-friendly and the MapExporter seems to work.

Terrain exporting is not yet implemented.