Buildings can now include "[relativeAmount]% weight to this choice for AI decisions"

Re-added changes for puppet city unique - By Emandac

Flash `ChatButton` on New Chat Messages - By touhidurrr

By RobLoach:
- Add Great Admiral 
- Allow weighted AI decisions in Event Choices 

AI valuea space resources and Manhattan project more - By EmperorPinguin

By unciv-loof:
- Prevent skip/resign button showing before first turn in MP games
- No special treatment for spectators to skip/resign players