Changes for Campaign Vicksburg V1.03
    - AI firing is now by stack instead of by unit.
    - Activate AI when under Manual control now only activates AI Firing and
      not AI Movement.
    - Added new Ammo Artillery by Cannon optional rule.
    - Added ability to specify alternative arrival hexes for a reinforcement.
    - Added Alternate Melee Resolution rule which separates melees into
      separate phase.
    - Added fix for Uncrewed or Spiked artillery spotting enemy units.
    - Added toolbar button for Command Range.
    - Added new Proportional Opportunity Fire Optional Rule that causes
      Opportunity Fire generated by firing units to be more proportional to
      the total strength of the units firing.
    - Added new Parameter Data value that controls when artillery crews are
      killed.
    - Added new Alternate Fixed Unit release Optional Rule that releases Fixed
      units within 5 hexes of an enemy unit regardless of Line-of-Sight to that
      unit.
    - Fix for some screensavers causing game to go blank.