http://www.liaoxuefeng.com/wiki/0013739516305929606dd18361248578c67b8067c8c017b000
http://git-scm.com/book/zh
http://iissnan.com/progit/index.html
http://blog.jobbole.com/53573/
http://marklodato.github.io/visual-git-guide/index-zh-cn.html
原文：http://my.oschina.net/u/2287186/blog/375588