https://stackoverflow.com/questions/7335420/global-git-ignore
git config --global core.excludesfile ‘~/.gitignore‘
git config --get core.excludesfile
https://help.github.com/articles/ignoring-files/#create-a-global-gitignore
Global Git ignore - Stack Overflow
原文：http://www.cnblogs.com/itzxy/p/7471996.html