参考：http://stackoverflow.com/questions/25671785/git-fatal-unable-to-auto-detect-email-address
正确使用命令：
$ git config --global user.email "you@example.com"
Already been asked: Why Git is not allowing me to commit even after configuration? To be sure run:
$ git config --local -l
git: fatal unable to auto-detect email address
原文：http://www.cnblogs.com/zl0372/p/git_2.html