By SomeTroglodyte:
- A Conditional checking for a Building globally 
- Unit actions "paging" new architecture 
- Fix RequiresBuildingInSomeCities not being displayed in city constructions as rejection reason 

By SeventhM:
- Fix Spectator stats when viewing another civ 
- Allow units to upgrade to more than one unit 
- Fix problems with stats from tiles and improvements 

Improved Spectator selected Civ coloring  - By tuvus