- town screen is mostly implemented, has some minor issues
- factions are now separate from towns, neutrals have faction with id=9
- more constants to GameConstants: town-specific buildings, strings for terrains and resources
- replaced most access to builtBuildings with isBuilt() method
- replaced id's with enums for town subtype and buildings id's
- moved almost all loading to TownHandler
- CBuildings and CStructures are now part of CTown
- merged hall.json into buildings.json
Should not cause any crashes or glitches