Added simple Biome system. Completely inactive right now - but can add a BiomeSampler component and add which Biome asset types you want in the generation. Can easily get which Biome you're in from X, Z voxel coordinates. The sampling code is basic right now, determines biome based on a temperature noise map and each Biome asset determines their temperature. Right now Biome assets can only determine the block types that are used in generation.