Post Release Day 14 Update

We're back after the weekend, and the updates continue...

• The Flame Tank unit now uses the correct sprites, both on the map and during combat cutscenes.
  
• Changed combat rounding so a unit under 1% after taking damage will now be destroyed, rather than remaining at a fraction of a percentage point.
  
• Fixed issue where replaying and completing a mission on a lower difficulty would overwrite the higher rank.
  
• Fixed incorrect wave colours on Forest and Desert backgrounds for naval units.
  
• Fixed an issue where save game data could save units with 0 hp.