vim Google style format
https://github.com/google/vim-codefmt
https://github.com/rhysd/vim-clang-format
http://pre.tir.tw/008/blog/output/vim-shi-yong-google-c-coding-style-pai-ban.html
https://clang.llvm.org/docs/ClangFormatStyleOptions.html
http://zh-google-styleguide.readthedocs.io/en/latest/google-cpp-styleguide/magic/
http://blog.csdn.net/fengbingchun/article/details/47341765
http://harttle.land/2018/01/06/cpplint-config.html
https://github.com/google/styleguide/tree/gh-pages/cpplint