Modding:
- More unit uniques applicable globally
- Recognize Tutorials.json file in ruleset validation

"Unavailable" promotions are unavailable in UI as well

Can go to war with no warmongering penalties if allied or protected city-states have been attacked

City states no longer gift units that push us over resource limits 

Allow unitset and tileset overrides for base ruleset mods

Enhance modding freedom for Natural Wonders  - By SomeTroglodyte