SpawnPoint

The specific changes include:

# Improved driver checks for various cards that can have problems with specific driver versions
# Various updates to Russian and Polish localization
# Fixed loading screen and intro movie showing up on Windows Vista with full screen AA
# Spies can no longer reload their revolver while cloaked
# Demomen grenades now collide with players and Engineer buildings after the first bounce, but still won't explode on contact
# Improved startup network initialization to catch issues with server firewalls popping up in the background
# Fixed a sound corruption issue which could cause audio popping
# Fixed achievement storage issues that caused a problem with the Head of the Class achievement