Resolved ANR in City Screen by increasing performance of rankTileForExpansion

By SomeTroglodyte:
- Move UncivServer to own module
- Font choice rework 
- Reworked "Creates improvement on a specific tile" Unique

By Azzurite:
- Fixed Barbarian Camps revealed by Honor not showing immediately in multiplayer

By JackRainy:
- Auto-downloading missing mods for save files
- Typed missing uniques