af8eb90563
Add JsonFileRoomStorage and JsonFileTrackingStorage implementations that implement the RoomStorage and TrackingStorage ports. - Stores room data at ~/.jigaido/data/<room_id>.json - Stores tracking data at ~/.jigaido/tracking/<room_id>_<user_id>.json - Implements all port methods: load, save, add_bounty, update_bounty, delete_bounty, get_bounty for rooms; load, save, track_bounty, untrack_bounty for tracking Fixes #9