Testing: Damage animations on damaged units

Units sprites move towards the enemy they're attacking

Removed deprecated settings

By WhoIsJohannes:
- Performance improvements
- AI does not consider Barbarian as 'enemy civ' for 'should we declare war' decisions
- Don't leak other civs in the game through LineChart colors.

Avoid first contact alerts for dead City-States  - By SomeTroglodyte