New map

Preparations multiple AIs like 2vs2 or 2vs4.

Small fix and new map

Option to choose a clan:
Stag, Goat, Bear, Wolf, Boar, Horse, Raven, Snake, Ox

Units no longer get stuck for years on a single tile.
No starvation during winter.
No pointless attacking of neutral factions.

- AI plays significantly fairer up to the 'extreme' difficulty level
- Added more difficulty levels
- Changed map
- AI can play all nothern clans.

Nerfed AI