- Categorized invisibility stuff into #defines. If any errors appear - let me know.

- Hopefully addressed the concerns about the ultra-darkness. Night vision, mesons, thermals and material scanners now make you see through darkness. (Lighting code does not affect you)
- Ghosts get a "toggle darkness" verb, which changes their see_invisibility. When the toggle is enabled, ghosts cannot see other ghosts. This is due to invisibility.

git-svn-id: http://tgstation13.googlecode.com/svn/trunk@4235 316c924e-a436-60f5-8080-3fe189b3f50e

code/defines/area/Space Station 13 areas.dm

@@ -26,6 +26,7 @@ NOTE: there are two lists of areas in the end of this file: centcom and station
 	icon_state = "unknown"
 	layer = 10
 	mouse_opacity = 0
+	invisibility = INVISIBILITY_LIGHTING
 	var/lightswitch = 1
 
 	var/area_lights_luminosity = 9	//This gets assigned at area creation. It is used to determine how bright the lights in an area should be. At the time of writing the value that it gets assigned is rand(6,9) - only used for light tubes

code/defines/mob/living/living.dm

@@ -6,3 +6,4 @@
 	var/now_pushing = null
 	var/cameraFollow = null
 	var/tod = null // Time of death
+	see_invisible = SEE_INVISIBLE_LIVING