init - add project files

vendor/github.com/microcosm-cc/bluemonday/CREDITS.md

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+1. John Graham-Cumming http://jgc.org/
+1. Mohammad Gufran https://github.com/Gufran
+1. Steven Gutzwiller https://github.com/StevenGutzwiller
+1. Andrew Krasichkov @buglloc https://github.com/buglloc
+1. Mike Samuel mikesamuel@gmail.com
+1. Dmitri Shuralyov shurcooL@gmail.com
+1. opennota https://github.com/opennota https://gitlab.com/opennota
+1. Tom Anthony https://www.tomanthony.co.uk/