examine signature changed to include distance

- distance is INFINITE, 0, or a positive integer based on get_dist() between
the examiner and examinee's turfs when they are on the same Z. When the
examiner is dead or a ghost, distance is always 0.
- also updates /examine( implementations to use it!
- adds w_class_to_name proc for reusing "It is a X item." examine behavior.

code/modules/organs/internal/brain.dm

@@ -122,7 +122,7 @@ GLOBAL_LIST_BOILERPLATE(all_brain_organs, /obj/item/organ/internal/brain)
 	to_chat(brainmob, "<span class='notice'>You feel slightly disoriented. That's normal when you're just \a [initial(src.name)].</span>")
 	callHook("debrain", list(brainmob))
 
-/obj/item/organ/internal/brain/examine(mob/user) // -- TLE
+/obj/item/organ/internal/brain/examine(mob/user, distance, infix, suffix) // -- TLE
 	. = ..()
 	if(brainmob && brainmob.client)//if thar be a brain inside... the brain.
 		. += "You can feel the small spark of life still left in this one."

code/modules/organs/organ.dm

@@ -191,7 +191,7 @@ var/global/list/organ_cache = list()
 		handle_rejection()
 		handle_germ_effects()
 
-/obj/item/organ/examine(mob/user)
+/obj/item/organ/examine(mob/user, distance, infix, suffix)
 	. = ..()
 	if(status & ORGAN_DEAD)
 		. += "<span class='notice'>Decay appears to have set in.</span>"

code/modules/organs/organ_external.dm

@@ -148,9 +148,9 @@
 		return //no eating the limb until everything's been removed
 	return ..()
 
-/obj/item/organ/external/examine()
+/obj/item/organ/external/examine(mob/user, distance, infix, suffix)
 	. = ..()
-	if(in_range(usr, src) || istype(usr, /mob/observer/dead))
+	if(distance < 2 || istype(usr, /mob/observer/dead))
 		for(var/obj/item/I in contents)
 			if(istype(I, /obj/item/organ))
 				continue