4.20.15
Improvements that cost stockpiled resources do so when starting construction, not on end, similar to buildings and units
Memory reduction for large maps
AI in Prince difficulty get no unit cost reduction (1:1 with human players)
Require CreatesOneImprovement targets be owned by constructing city - By superdusto
Resource overview tab improvements - By SomeTroglodyte
Modding: Fixed Personality uniques validation - By mvanhorn