buildmode fix + blueprints fix (#2261)

* Fixes Admin Buildmode Mass-Deletion making people nude, gives GetAllContents() an ignore typecache.

* sync turf.dm

code/__HELPERS/unsorted.dm

@@ -491,17 +491,26 @@ Turf and target are separate in case you want to teleport some distance from a t
 	var/y=arcsin(x/sqrt(1+x*x))
 	return y
 
-/atom/proc/GetAllContents()
+/atom/proc/GetAllContents(list/ignore_typecache)
 	var/list/processing_list = list(src)
 	var/list/assembled = list()
+	if(ignore_typecache)		//If there's a typecache, use it.
+		while(processing_list.len)
+			var/atom/A = processing_list[1]
+			processing_list -= A
+			if(ignore_typecache[A.type])
+				continue
+			processing_list |= (A.contents - assembled)
+			assembled |= A
 
-	while(processing_list.len)
-		var/atom/A = processing_list[1]
-		processing_list -= A
+	else		//If there's none, only make this check once for performance.
+		while(processing_list.len)
+			var/atom/A = processing_list[1]
+			processing_list -= A
 
-		processing_list |= (A.contents - assembled)
+			processing_list |= (A.contents - assembled)
 
-		assembled |= A
+			assembled |= A
 
 	return assembled