Add a visual gear for drawing circles. Intent is to allow specifying areas on map for lua scripts (such as to indicate a location to go to). Could also be used to, say, circle a hog in CTF. Also add a "Critical" flag for visual gears so a gear flagges as such will always be created.
23ab3bdbf218
This should fix Chip's bug with unlimited teleports. Also remove more hog placement special behaviour and just use ResetWeapons with a check against PlacingHogs mode
