FAB-9362 add CONTRIBUTING.md and CODE_OF_CONDUCT.md

Change-Id: I01f2039d9835e6ccccce17c2b719115e8a6f7c1e
Signed-off-by: Christopher Ferris <chrisfer@us.ibm.com>

CODE_OF_CONDUCT.md

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+Code of Conduct Guidelines
+==========================
+
+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>.

CONTRIBUTING.md

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+## Contributing
+
+We welcome contributions to the Hyperledger Fabric Project in many forms, and
+there's always plenty to do!
+
+Please visit the
+[contributors guide](http://hyperledger-fabric.readthedocs.io/en/latest/CONTRIBUTING.html) in the
+docs to learn how to make contributions to this exciting project.
+
+## Code of Conduct Guidelines <a name="conduct"></a>
+
+See our [Code of Conduct Guidelines](../blob/master/CODE_OF_CONDUCT.md).
+
+## Maintainers <a name="maintainers"></a>
+
+Should you have any questions or concerns, please reach out to one of the project's [Maintainers](../blob/master/MAINTAINERS.md).
+
+<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>.