New Leader Portraits

• Replaced perhaps our most egregious pieces of placeholder art with original professional portraits that are quite fetching
  
• This is part of the increased diversity between civs that is coming in future updates
  

Bug Fixes and Minor Improvements

• Fixed issues that could occur when you pillage one of your own cities
  
• Added an on-mouseover popup for the glowing red resource icons that mean you have unpaid maintenance on a hex
  
• Invalid order error message improvements
  
• Removed the war status icons since you're always at war