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.

if(WIN32 AND NOT UNIX)
	file(GLOB DLLs *.dll)
	
	install(FILES
		${DLLs}
		DESTINATION bin)
endif(WIN32 AND NOT UNIX)