Update README.md

Freelander · Freelander · commit 7640d813ef05 · 2016-08-11T18:33:15.000+02:00
diff --git a/README.md b/README.md
@@ -263,6 +263,7 @@
 - [ProGit 中文版](https://git-scm.com/book/zh/v2)
 - [廖雪峰的 Git 教程](http://www.liaoxuefeng.com/wiki/0013739516305929606dd18361248578c67b8067c8c017b000)
 - [Git 简易指南](http://rogerdudler.github.io/git-guide/index.zh.html)
+- [git-tips](https://github.com/git-tips/tips)(Git 命令集合)
 
 ## 文档
 
