Removes unsimulated turfs.

Moves shuttle turfs to paths under /turf/simulated/floor and /turf/simulated/wall
Players can now safely build on top of shuttle turfs
Fixes #1711
Adds several but not all paths for the different types of floor turfs, most of them in plasteel_floor.dm
The turf pathings are still in need of a deeper organization, but this is at least a start

code/modules/mob/interactive.dm

@@ -286,7 +286,7 @@
 	else
 		unEquip(I,TRUE)
 	update_hands = 1
-	
+
 /mob/living/carbon/human/interactive/proc/targetRange(var/towhere)
 	return get_dist(get_turf(towhere), get_turf(src))
 
@@ -473,7 +473,7 @@
 /mob/living/carbon/human/interactive/proc/target_filter(var/target)
 	var/list/L = target
 	for(var/atom/A in target)
-		if(istype(A,/area) || istype(A,/turf/unsimulated) || istype(A,/turf/space))
+		if(istype(A,/area) || istype(A,/turf/space))
 			L -= A
 	return L