fa0875e63b
- Adds two variants of library ruins: surface (generates in forested biomes) and underground (generates everywhere) - Adds loot table support to bookshelves - Adds antique atlas markers for library ruins - Adds bookshelves and lecterns to the wood type template processor - Makes bookshelves and lecterns rotate correctly in structure templates - Generalises most of the methods in WorldGenSurfaceStructure to a new superclass WorldGenWizardryStructure