Technical update

• Major revision of json settings system
• Added filters for decorating levels after generation
• Added spawnchance config option to reduce dungeon generation rate using probability value
• Removed num_rooms, range, scatter from config, moved to settings
• fixed bug which could cause ghost entities to spawn in multiplayer
• fixed bug where dimension criteria would use dimension type instead of ID
• "roguelike settings list" command can now take a namespace as an argument