Changes

• Added Ancient Altars
• Added Lost Pages
• Added a sacrifice system, utilizing Lost Pages (found in chests) and Ancient Altars (crafted) to transform items into other items, at a cost. More recipes for this are TBD.
• Added Slimed Netherrack, an ore.
• Added a config for whether the portal-opening sacrifice works or not.
• Added some recipes for making Blackstone from Soot and overworld rocks.