Forgot to add this.

modules/gamelib/util.lua

@@ -0,0 +1,11 @@
+function postostring(pos)
+  return pos.x .. " " .. pos.y .. " " .. pos.z
+end
+
+function dirtostring(dir)
+  for k,v in pairs(Directions) do
+    if v == dir then
+      return k
+    end
+  end
+end