- place_shroud and remove_shroud no longer accept a shroud data string or the special string "all"
- new functions are added to convert between lists of locations and shroud data strings
- place_fog, remove_fog, is_fogged, and is_shrouded aren't changed, only moved
- get_terrain and set_terrain replaced with direct indexing operations
- get_map_size mostly replaced with either the iterator or an on_board call.
Only a few cases really needed to know the size of the map for some other purpose.
- shroud and fog operations, village owner, time areas, and location filters
- get_terrain_info replaced with terrain_types table
- Map generation functions create_map and create_filter
