v0.43.2 Development Release

• PR #518: Implemented quirks: Stabilized weapon, barrel fist
• PR #518: Updated quirks for errata: Improved sensors, cooling system flaw,
  fragile fuel tank
• Issue #526: Further image atlas packaging bugs
• Issue #487: Carriage returns in startup.sh causing issues
• Removed BLDG_CF & BRIDGE_CF from board validator (these aren't strictly
  required, as they have default values if not defined)
• Issue #529: Movement Interruption with Dialog Box Ends Turn
• Data: New Sprites, Unit Fixes and RAT Fixes.