0.9f1 Update

Just a small update to clean up some bigger things we found. Thanks for the reports! Keep 'em coming!

• Restarting the game will no longer overwrite building destruction and corpse persistence setting
• Charge bonus will no longer apply when charging at buildings (units such as trolls still keep it though!)
• Cards such as 'Bombard' are now cleared properly on mission start
• Game should no longer crash when certain building slots are missing lock visuals