added global token

utils/global_token.lua

@@ -0,0 +1,20 @@
+local Token
+
+local tokens = {}
+
+local counter = 1
+
+function Token.register(var)
+    local c = counter
+
+    tokens[c] = var
+    counter = c + 1
+
+    return c
+end
+
+function Token.get(token_id)
+    return tokens[token_id]
+end
+
+return Token