NPC stuff

NPCs are unique by ID, and are not relative to an area
NPCMap connects NPCs to an Area
NPCInfo has a field to avoid using type-prefix (Camper, Juggler, etc)
ImageService will retrieve NPC icon
OverworldView shows NPCs in the Area
OverworldView click on NPC stub added
"Mom's House" and "Mom" added to database as Area#1 and NPC#1