Adding a Code of Conduct

This patch adds a code of conduct based on the TODOGroup / Twitter OSS code of conduct. The google doc used for initial drafting is https://docs.google.com/document/d/1cNM06FcKJ7CHdWvlAx55b0ZRG2-9pgv23teO6wEyJcQ/edit#.

I'm planning on aliasing pants-conduct to pants-committers as a starting point. I just linked the response team to COMMITTERS.md. I think it can be better though. Thoughts?

Bugs closed: 4031

Reviewed at https://rbcommons.com/s/twitter/r/4354/

CODE_OF_CONDUCT.md

@@ -0,0 +1,100 @@
+Pants Code of Conduct
+=====================
+
+This code of conduct outlines our expectations for participants within the
+Pants community, as well as steps for reporting unacceptable behavior. We
+are committed to providing a welcoming and inspiring community for all and
+expect our code of conduct to be honored. Anyone who violates this code of
+conduct may be banned from contributing to the project or participating in
+community discussion.
+
+This code is not exhaustive or complete. It serves to distill our common
+understanding of a collaborative, shared environment, and goals. We expect
+it to be followed in spirit as much as in the letter.
+
+
+Our open source community strives to:
+
+ * *Be friendly and patient.*
+ * *Be welcoming:* We encourage everyone to participate and are committed to
+   building a community for all. Although we will fail at times, we seek to
+   treat everyone as fairly and equally as possible. We strive to be a
+   community that welcomes and supports people of all backgrounds and
+   identities.
+ * *Be considerate:* Your work will be used by other people, and you in turn
+   will depend on the work of others. Any decision you take will affect users
+   and colleagues, and you should take those outcomes into account when making
+   decisions. Remember that we’re a world-wide community, so you might not be
+   communicating in someone else’s primary language.
+ * *Be respectful:* Not all of us will agree all the time, but disagreement is
+   no excuse for poor behavior and poor manners. We might all experience some
+   frustration now and then, but we cannot allow that frustration to turn into
+   a personal attack. It’s important to remember that a community where people
+   feel uncomfortable or threatened is not a productive one. On that note,
+   whenever a participant has made a mistake, we expect them to take
+   responsibility for it. If someone has been harmed or offended, it is our
+   responsibility to listen carefully and respectfully, and do our best to
+   right the wrong.
+ * *Be careful in the words that we choose:* we are a community of
+   professionals, and we conduct ourselves professionally. Be kind to others.
+   Do not insult or put down other participants. Harassment and other
+   exclusionary behavior isn’t acceptable.
+ * *Try to understand why we disagree:* Disagreements, both social and
+   technical, happen all the time. It is important that we resolve
+   disagreements and differing views constructively. Remember that the strength
+   of our community comes from different people have different perspectives on
+   issues. Being unable to understand why someone holds a viewpoint doesn’t
+   mean that they’re wrong. Don’t forget that it is human to err and blaming
+   each other doesn’t get us anywhere. Instead, focus on helping to resolve
+   issues and learning from mistakes.
+ * *Be inclusive:* Although this list cannot be exhaustive, we explicitly honor
+   diversity in age, gender, gender identity or expression, culture, ethnicity,
+   language, national origin, political beliefs, profession, race, religion,
+   sexual orientation, socioeconomic status, and technical ability. We will not
+   tolerate discrimination based on any of the protected characteristics above,
+   including participants with disabilities.
+
+Reporting Issues
+----------------
+
+If you have experienced or witnessed unacceptable behavior—or have any other
+concerns—please report it by contacting us via [email protected].
+All reports will be handled with discretion. In your report please include:
+
+ * Your contact information.
+ * Names (real, nicknames, or pseudonyms) of any individuals involved. If there
+   are additional witnesses, please include them as well. Your account of what
+   occurred, and if you believe the incident is ongoing. If there is a publicly
+   available record (e.g. a mailing list archive or a slack history), please
+   include a link.
+ * Any additional information that may be helpful.
+
+After filing a report, a representative will contact you personally, review the
+incident, follow up with any additional questions, and make a decision as to
+how to respond. If the person who is harassing you is part of the response
+team, they are required to be excluded from handling your incident. If the
+complaint originates from a member of the response team, it will be handled by
+a different member of the response team. We will respect confidentiality
+requests for the purpose of protecting victims of abuse. We will endeavor to
+make an alternative reporting chain available in the event you need to report a
+project lead or a member of the response team. The members of the response team
+can be found in [COMMITTERS.md](https://github.com/pantsbuild/pants/blob/master/COMMITTERS.md#active-committers).
+
+
+Attribution & Acknowledgements
+------------------------------
+
+This code of conduct is based on the
+[Open Code of Conduct v1.0](https://github.com/todogroup/opencodeofconduct) from the [TODOGroup](http://todogroup.org/).
+
+
+We all stand on the shoulders of giants across many open source communities.
+We’d like to thank the communities and projects that established code of
+conducts and diversity statements as our inspiration:
+
+ * [Django](https://www.djangoproject.com/conduct/reporting/)
+ * [Python](https://www.python.org/community/diversity/)
+ * [Ubuntu](http://www.ubuntu.com/about/about-ubuntu/conduct)
+ * [Contributor Covenant](http://contributor-covenant.org/)
+ * [Geek Feminism](http://geekfeminism.org/about/code-of-conduct/)
+ * [Citizen Code of Conduct](http://citizencodeofconduct.org/)

src/docs/index.md

@@ -46,3 +46,4 @@ Contributing to Pants
 ---------------------
 
 + [[Pants Developer Center|pants('src/docs:dev')]]
++ [Code of Conduct](https://github.com/pantsbuild/pants/blob/master/CODE_OF_CONDUCT.md)