Update 22 December 2021

Happy Christmas everybody. This update includes improvements to the AI, opening the soldiers.xml file for modding and a few bug fixes and minor improvements.

• Opened soldier.sxml file for modding. Included example in Example Mod.
  
• Tweaks to AI to improve unit diversity, and handle allocation of existing units more flexibly.
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• }Fixed bug where sometimes AI would surround city but not attack. Also should be fewer leader only stacks running around.
  
• Fixed unit replenishment indicator not showing.
  
• Fixed bug with some 3K events.
  
• Overlord stacks can now move through vassal stacks even in vassal's territory.