Foundation for building

[Fostik]

So yeah, let us craft a special material like concrete that we will be able use for creating a foundation for builds, walls, etc.
What for?
1. Build on sand
2. Build on swamps (sorry i dont know how to prevent swamp bunkers)
3. Build on clay nodes
4. Create a flat areas faster than with paving
5. Improve minehole, dock recipes.