Advanced Features

• Add new advanced MicroSplat features
• Add simple templating for XML includes
• Fix topsoil previews to use proper texture
• Fix textures of falling blocks by patching old atlas
• Fix shader not being assigned after world reload
• Add per texture smoothness flag to shader options
• Update asset bundle to strip more shaders variants
• Adjust biome-weight XML API for biome-layer
• Implement loading of metal shaders for MacOSX