Pyrellium

This update alters world generation, be sure to back up your world when updating

Pyrellium changelog

• Updated the quartz crystal texture
• Changed surface rules of ghostly woods and infested valley to go deeper
• Added blacktone rocks, a lava placeable block, and added them to the lava lakes in the 'colder' biomes, and blackstone springs
• Overhauled frostburn valley gen