Fixed AI army cost issue
Fixed AI xp per turn and Piety policies
Legion cost & strength increase
Small fixes

Increased AIFreeXPPercent
Added LoadedFile line to CEAI_Buildings.sql
Purchasing things in cities doesn't close production panel.
Citystates give yields when captured.
Increased connection income for low-pop cities.
Great Improvements connect resources.
Discipline promotion does not show over untis.
Small changes

- Removed duplicate ConquestProb section.
- Increased land trade income.
- Increased city connection income.
- Reduced courthouse cost.
Various improvements

- Discipline effect no longer shows over a whole army.
- Great Admiral requires Astronomy to cross oceans.
- Great Improvements no longer give extra yields on resources.
- Isles are only a line-of-sight obstacle.
- Reworked the code interpretation of some UU combat strength.
- CEG unit flavors now match CAT and Civup/GEM.
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Leader buffs