adding directories in which to find CONTRIBUTING, SUPPORT and COC files
adding directories in which to find CONTRIBUTING, SUPPORT and COC files

Adding support for root, `.github`, and `docs` as a location for support
contributing, and code of conducts files. GitHub supports these

See
https://help.github.com/articles/setting-guidelines-for-repository-contributors/
https://help.github.com/articles/adding-support-resources-to-your-project/
https://help.github.com/articles/adding-a-code-of-conduct-to-your-project/

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