Hotfix 0.6.4

- Fixed a bug where AI calculated free inventory slots wrong rarely. This issue caused peasants stucking while resource dropping and loading.
- Reduced enemies' stats in late game.
- Fixed issues with artisans' and armorers' resource loading.
- Optimization of artisans, armorers and farmers.
- Warriors will use torches in battles more often during night time.
- Text corrections.