add bitsy (#172)

README.md

@@ -195,6 +195,7 @@ Code
 * :tada: [AndEngine](http://www.andengine.org) - 2D Android Game Engine
 * :tada: [Azul3D](http://azul3d.org/) - A 3D engine written in Go.
 * :tada: [Bacon2D](http://bacon2d.com/) - A framework to ease 2D game development, providing ready-to-use QML elements representing basic game entities needed by most of games.
+* :tada: [bitsy](https://ledoux.itch.io/bitsy) - A little editor for little games or worlds. The goal is to make it easy to make games where you can walk around and talk to people and be somewhere.
 * :tada: [Bladecoder](https://github.com/bladecoder/bladecoder-adventure-engine) - Classic point and click adventure game engine and editor.
 * :money_with_wings: [Blend4Web](http://www.blend4web.com/) - A Javascript framework for creating and displaying interactive 3D computer graphics in web browsers.
 * [Blitz3D](http://www.blitzbasic.com/Products/blitz3d.php) 3D basic-like programming language for fast 3D desktop games.

README_ch.md

@@ -196,6 +196,7 @@
 * [Allegro](http://liballeg.org/) - Allegro 4 & 5 是跨平台，开源的游戏编程库，主要面向 C 和 C++ 开发者。 ![open soucce](/img/opensource.png)
 * [AndEngine](http://www.andengine.org) - 2D Android 游戏引擎。
 * [Bacon2D](http://bacon2d.com/) - 一个方便 2D 游戏开发的框架，提供了即用的 QML 元素去表示游戏中普遍存在的基本游戏元素。
+* [bitsy](http://ledoux.io/bitsy/editor.html) - 一个微型rpg制作器，探索空间，对话。
 * [Bladecoder](https://github.com/bladecoder/bladecoder-adventure-engine) - 经典的点击型冒险游戏引擎和编辑器。
 * [Box2D](http://box2d.org/) - 一款 2D 游戏物理引擎。
 * [Chipmunk C#](https://github.com/netonjm/ChipmunkSharp) - 由C#程序语言实现的 Chipmunk2D 工具库。