Features
- Siegfried Line - c18: Added Message boxes concerning German counterattack (Allen)

Bugs
- crash: find_UnitI_by_game_id: game_id 'UsPlayer_Cottonbalers' is ambiguous (Luke) - latest effort on this nasty.
- Crash: 'NoneType' object has no attribute 'fow_uncertain_p' (luke)
- Crash: 'NoneType' object has no attribute 'fow_uncertain_p' (luke)
- Crash AttrIconFontSprite' object has no attribute 'DrawOrderedSpriteIs' (Luke)