添加MyBatis 代码生成器中文文档

添加MyBatis 代码生成器（MyBatis Generator）中文文档

README.md

@@ -399,6 +399,7 @@
 * [Spring Framework 4.x参考文档](https://github.com/waylau/spring-framework-4-reference)
 * [Spring Boot参考指南](https://github.com/qibaoguang/Spring-Boot-Reference-Guide) (翻译中)
 * [MyBatis中文文档](http://mybatis.org/mybatis-3/zh/index.html)
+* [MyBatis Generator 中文文档](http://mbg.cndocs.tk/)
 * [用jersey构建REST服务](https://github.com/waylau/RestDemo)
 * [Activiti 5.x 用户指南](https://github.com/waylau/activiti-5.x-user-guide)
 * [Google Java编程风格指南](http://www.hawstein.com/posts/google-java-style.html)