Caves and Coal — Aethelon Steam update #94209

Caves have arrived. \Perlin worm cave carving. Perlin noise cavern carving.New block: Stone with Coal.Small performance optimizations.The sub-surface chunk generation now occurs at a much larger radius centered on the player. This allows vertical caves and caverns to generate at the same radius as the horizontal view distance. This causes a 6 fold increase in generated chunks below the surface and is particularly noticeable during initial player spawning.