0.9.89.14b Buff Cannon bird

0.9.89.14b • Aircraft autocannon penetration no longer decreases with impact angle. • Attacks that penetrate a vehicle's top or bottom armor are now guaranteed critical hits (double damage). • Increased the Cannonbird's muzzle velocity. • Fixed a bug where the turret modification screen couldn't switch turrets properly. • Added the Open top keyword to the Kübelwagen, Sd.Kfz.222, Sd.Kfz.250/9, and Aufk.-Panzer 38(t).