rewrite client demo by lua, remove old C version client demo

3rd/lua-cjson/lua/json2lua.lua

@@ -0,0 +1,14 @@
+#!/usr/bin/env lua
+
+-- usage: json2lua.lua [json_file]
+--
+-- Eg:
+-- echo '[ "testing" ]' | ./json2lua.lua
+-- ./json2lua.lua test.json
+
+local json = require "cjson"
+local util = require "cjson.util"
+
+local json_text = util.file_load(arg[1])
+local t = json.decode(json_text)
+print(util.serialise_value(t))