Adds bare bones for a persistence system

Admins can toy around with converting a character to text, and
placing them back elsewhere, independent of the round.

It's got a kink, though: The text given to you directly needs to be
printed once to remove all the escapes - otherwise the thing will choke.
I'd like advice on resolving that

code/modules/admin/verbs/serialization.dm

@@ -0,0 +1,26 @@
+/client/proc/admin_serialize()
+	set name = "Serialize Marked Datum"
+	set desc = "Turns your marked object into a JSON string you can later use to re-create the object"
+	set category = "Debug"
+
+	if(!check_rights(R_ADMIN))
+		return
+
+	if(!istype(holder.marked_datum, /atom/movable))
+		to_chat(src, "The marked datum is not an atom/movable!")
+		return
+
+	var/atom/movable/AM = holder.marked_datum
+	to_chat(src, json_encode(AM.serialize()))
+
+/client/proc/admin_deserialize()
+	set name = "Deserialize JSON datum"
+	set desc = "Creates an object from a JSON string"
+	set category = "Debug"
+
+	if(!check_rights(R_ADMIN|R_DEBUG))
+		return
+
+	var/json_text = input("Enter the JSON code:","Text") as message|null
+	if(json_text)
+		json_to_object(json_text, get_turf(usr))