Add a code of conduct for the project.

CODE_OF_CONDUCT.md

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+Galaxy Project Code of Conduct
+==============================
+
+This code of conduct outlines our expectations for participants within the
+Galaxy community, as well as steps to 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 the community.
+
+Our open source community strives to:
+
+* **Be friendly and patient.**
+
+* **Be welcoming**: We strive to be a community that welcomes and
+  supports people of all backgrounds and identities. This includes, but is not
+  limited to members of any race, ethnicity, culture, national origin, colour,
+  immigration status, social and economic class, educational level, sex, sexual
+  orientation, gender identity and expression, age, size, family status,
+  political belief, religion, and mental and physical ability.
+
+* **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 consequences 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.
+
+* **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 aren't acceptable. This includes, but is not limited to: Violent
+  threats or language directed against another person, Discriminatory jokes and
+  language, Posting sexually explicit or violent material, Posting (or
+  threatening to post) other people’s personally identifying information
+  (“doxing”), Personal insults, especially those using racist or sexist terms,
+  Unwelcome sexual attention, Advocating for, or encouraging, any of the above
+  behavior, Repeated harassment of others. In general, if someone asks you to
+  stop, then stop.
+
+* **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 we’re different. Diversity
+  contributes to the strength of our community, which is composed of people
+  from a wide range of backgrounds. 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.
+
+### Diversity Statement
+
+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 both as
+fairly and equally as possible. 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.
+
+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 experience or witness unacceptable behavior—or have any other concerns,
+please report it by contacting us by contacting Dave Clements
+(clementsgalaxy@gmail.com). To report an issue involving Dave Clements please
+email James Taylor (james@taylorlab.org). 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 public IRC logger), 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 will recuse themselves 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.
+
+### Attribution & Acknowledgements
+
+This code of conduct is based on the Open Code of Conduct from the TODOGroup.