Fix critical failure to cleanup teams list after rejoining game after a force-quit. Fixes bug #597

Backed out changeset 6c0cf6b9eff8. Scripters should be prepared for nil and pretending the gear exists would cause more pain

Clean up more visual gears stuff in scripts - Make vgears non-critical if possible - Add nil checks where needed - Fix related bugs - Remove doomed attempts to call FollowGear on vgears

Clean up legacy visual gear stuff in ClimbHome, fix star despawn, make stars non-critical

Remove calls to GetVisualGearValues where it's not needed

Animate: Remove follow arg from AnimVisualGear

use 0s instead of nils to try to protect script assumptions

only-stats should never create visual gears. and lua should never rely on visual gears being created. critical is just to help ensure ones important to gameplay don't get lost in fast-forward

Remove unused shockwave code in Space Invasion

Make decorational visual gears in Space Invasion non-critical