Early Access Build 0.9.17

This patch is small and fixes issues with a couple cards.

• HOME DEFENSE shows now the preview of both cards it spawns when you hover over it.
  

• NATIONAL FIRE SERVICE reduces damage to units and causes the HQ to heal if multiple NFS cards are in hand. Fixed.
  
• The Kredit costs for HOME DEFENSE dropped to zero under certain conditions. Fixed.
  
• The Deck Export doesn't include the Gold card count. Fixed.