Add contributing guidelines and code of conduct

Author: kconner

CODE_OF_CONDUCT.md

@@ -0,0 +1,75 @@
+# Contributor Covenant Code of Conduct
+
+## Our Pledge
+
+In the interest of fostering an open and welcoming environment, we as
+contributors and maintainers pledge to making participation in our project and
+our community a harassment-free experience for everyone, regardless of age, body
+size, disability, ethnicity, gender identity and expression, level of experience,
+nationality, personal appearance, race, religion, or sexual identity and
+orientation.
+
+## Our Standards
+
+Examples of behavior that contributes to creating a positive environment
+include:
+
+* Using welcoming and inclusive language
+* Being respectful of differing viewpoints and experiences
+* Gracefully accepting constructive criticism
+* Focusing on what is best for the community
+* Showing empathy towards other community members
+
+Examples of unacceptable behavior by participants include:
+
+* The use of sexualized language or imagery and unwelcome sexual attention or
+advances
+* Trolling, insulting/derogatory comments, and personal or political attacks
+* Public or private harassment
+* Publishing others' private information, such as a physical or electronic
+  address, without explicit permission
+* Other conduct which could reasonably be considered inappropriate in a
+  professional setting
+
+## Our Responsibilities
+
+Project maintainers are responsible for clarifying the standards of acceptable
+behavior and are expected to take appropriate and fair corrective action in
+response to any instances of unacceptable behavior.
+
+Project maintainers have the right and responsibility to remove, edit, or
+reject comments, commits, code, wiki edits, issues, and other contributions
+that are not aligned to this Code of Conduct, or to ban temporarily or
+permanently any contributor for other behaviors that they deem inappropriate,
+threatening, offensive, or harmful.
+
+## Scope
+
+This Code of Conduct applies both within project spaces and in public spaces
+when an individual is representing the project or its community. Examples of
+representing a project or community include using an official project e-mail
+address, posting via an official social media account, or acting as an appointed
+representative at an online or offline event. Representation of a project may be
+further defined and clarified by project maintainers.
+
+## Enforcement
+
+Instances of abusive, harassing, or otherwise unacceptable behavior may be
+reported by contacting the project team at [email protected]. All
+complaints will be reviewed and investigated and will result in a response that
+is deemed necessary and appropriate to the circumstances. The project team is
+obligated to maintain confidentiality with regard to the reporter of an incident.
+Further details of specific enforcement policies may be posted separately.
+
+Project maintainers who do not follow or enforce the Code of Conduct in good
+faith may face temporary or permanent repercussions as determined by other
+members of the project's leadership.
+
+## Attribution
+
+This Code of Conduct is adapted from the [Contributor Covenant][homepage], version 1.4,
+available at [http://contributor-covenant.org/version/1/4][version]
+
+[homepage]: http://contributor-covenant.org
+[version]: http://contributor-covenant.org/version/1/4/
+

CONTRIBUTING.md

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+To contribute, fork our project on GitHub, then submit a pull request to our `master` branch.
+
+Before submitting a pull request, please make sure you have tested your changes.
+
+---
+
+By submitting a pull request, you represent that you have the right to license
+your contribution to WillowTree and the community, and agree by submitting the patch
+that your contributions are licensed under the [Apache License](LICENSE).

README.md

@@ -68,4 +68,10 @@ The names `"no-stop"` and `"no-print"` are the names of [rules](https://willowtr
 * `"warn"` or `1` - turn the rule on as a warning (doesn't affect exit code)
 * `"error"` or `2` - turn the rule on as an error (exit code will be 1)
 
-The three error levels allow you fine-grained control over how Wist applies rules (for more configuration options and details, see the [configuration docs](https://willowtreeapps.github.io/wist/user-guide/configuring)).
+The three error levels allow you fine-grained control over how Wist applies rules (for more configuration options and details, see the [configuration docs](https://willowtreeapps.github.io/wist/user-guide/configuring)).
+
+## Contributing to Wist
+
+Contributions are welcome. Please see the [Contributing guidelines](CONTRIBUTING.md).
+
+Wist has adopted a [code of conduct](CODE_OF_CONDUCT.md) defined by the [Contributor Covenant](http://contributor-covenant.org), the same used by the [Swift language](https://swift.org) and countless other open source software teams.