Add contact info and responders

CODE_OF_CONDUCT.md

@@ -9,5 +9,17 @@ In general, this means that everyone is expected to be **open**,
 **considerate**, and **respectful** of others no matter what their position is
 within the project.
 
+## Reporting
+
+All incidents should be reported by emailing conduct@pypa.io. This email is an
+alias with the following responders:
+
+* Dustin Ingram (https://github.com/di)
+* Bernát Gábor (https://github.com/gaborbernat)
+* Donald Stufft (https://github.com/dstufft)
+
+For any report that involves the above admins/moderators, email
+conduct-wg@python.org instead.
+
 [Python Packaging Authority]: https://github.com/pypa/
 [PSF Code of Conduct]: https://www.python.org/psf/conduct/