implemented multi query search functionality

util.lua

@@ -1,4 +1,5 @@
-Aux.util = {}
+local private, public = {}, {}
+Aux.util = public
 
 Aux.util.LT = {}
 Aux.util.EQ = {}
@@ -9,6 +10,14 @@ local merge, copy_array
 function Aux.util.pass()
 end
 
+function public.copy_table(table)
+	local copy = {}
+	for k, v in pairs(table) do
+		copy[k] = v
+	end
+	return copy
+end
+
 function Aux.util.inventory_iterator()
     local inventory = {}
     for bag = 0, 4 do