Update code of conduct

Fixes #209

Signed-off-by: James Taylor <[email protected]>

CODE_OF_CONDUCT.md

@@ -1,8 +1,3 @@
-Code of Conduct Guidelines
-==========================
+# Code of conduct
 
-Please review the Hyperledger [Code of
-Conduct](https://wiki.hyperledger.org/community/hyperledger-project-code-of-conduct)
-before participating. It is important that we keep things civil.
-
-<a rel="license" href="http://creativecommons.org/licenses/by/4.0/"><img alt="Creative Commons License" style="border-width:0" src="https://i.creativecommons.org/l/by/4.0/88x31.png" /></a><br />This work is licensed under a <a rel="license" href="http://creativecommons.org/licenses/by/4.0/">Creative Commons Attribution 4.0 International License</a>.
+This project follows the [Hyperledger code of conduct](https://toc.hyperledger.org/code-of-conduct.html). Please review these guidelines before participating.