Nextbot survival

Major Update v1.0!

----Added----
- Microvoxels (slider at the bottom left)
- Far chunks renderer
- Voxel navigation for nextbots
- More devastating weapons and explosives
- Volumetric clouds
- Shadows

---Improved----
- Player movement is now more physics-based. You can now lie down
- Survival and building modes
- World edit mode
- Game world file settings: rename world, clone world.

---Coming soon---
- Player ragdoll
- Voxel structures