Create CODE_OF_CONDUCT.md

Author: JoelMarcey

CODE_OF_CONDUCT.md

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+# [Code of Conduct](code-of-conduct)
+
+The Rust Foundation has adopted a Code of Conduct that we expect project 
+participants to adhere to. Please read 
+[the full text][code-of-conduct] 
+so that you can understand what actions will and will not be tolerated.
+
+[code-of-conduct]: https://foundation.rust-lang.org/policies/code-of-conduct/