- Just a few tech prioritization fixes.

- The AI will now always upgrade its mech production lines to the latest available mech tech.

- The AI will now always upgrade its tank production lines to the latest available chassis. Also, it will create tank designs as soon as it can.
- Changed the mod thumbnail. Why were there snow tracks in front of the truck anyway? Hopefully no one noticed.

- The AI will use armored cars in suppression divisions in late game.

- The AI will no longer upgrade its armor and mot/mech division templates in field.
- The AI will make slightly more infantry.

- Slightly stronger Improved Medium Tank for Mass Assault. The old one was too weak.
- Reworked the role ratios for each subdoctrine. The army composition differences will come into effect gradually: some when the AI picks its doctrine, and some when it picks its doctrine subbranch.
- Reworked the minimum number of factories to produce certain armor division templates.
- Tweaked some tech priorities.