Contributor Covenant Code of Conduct

Currently we use clang-format to format the code. We recommend you to configure the clang-format according to the IDE / editor you use. The following link is how to configure vim / emacs / vscode to use clang-format.

• Vim https://github.com/rhysd/vim-clang-format
• Emacs https://github.com/llvm-mirror/clang/blob/master/tools/clang-format/clang-format.el
• VS Code https://code.visualstudio.com/docs/cpp/cpp-ide#_code-formatting