New copy of everything.

Signed-off-by: Cliff Hill <xlorep@darkhelm.org>

CONTRIBUTING.md

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+# Contributor Guide
+
+Thank you for your interest in improving this project.
+This project is open-source under the [MIT license] and
+welcomes contributions in the form of bug reports, feature requests, and pull requests.
+
+Here is a list of important resources for contributors:
+
+- [Source Code]
+- [Documentation]
+- [Issue Tracker]
+- [Code of Conduct]
+
+[mit license]: https://opensource.org/licenses/MIT
+[source code]: https://github.com/xlorepdarkhelm/plex-playlist
+[documentation]: https://plex-playlist.readthedocs.io/
+[issue tracker]: https://github.com/xlorepdarkhelm/plex-playlist/issues
+
+## How to report a bug
+
+Report bugs on the [Issue Tracker].
+
+When filing an issue, make sure to answer these questions:
+
+- Which operating system and Python version are you using?
+- Which version of this project are you using?
+- What did you do?
+- What did you expect to see?
+- What did you see instead?
+
+The best way to get your bug fixed is to provide a test case,
+and/or steps to reproduce the issue.
+
+## How to request a feature
+
+Request features on the [Issue Tracker].
+
+## How to set up your development environment
+
+You need Python 3.7+ and the following tools:
+
+- [Poetry]
+- [Nox]
+- [nox-poetry]
+
+Install the package with development requirements:
+
+```console
+$ poetry install
+```
+
+You can now run an interactive Python session,
+or the command-line interface:
+
+```console
+$ poetry run python
+$ poetry run plex-playlist
+```
+
+[poetry]: https://python-poetry.org/
+[nox]: https://nox.thea.codes/
+[nox-poetry]: https://nox-poetry.readthedocs.io/
+
+## How to test the project
+
+Run the full test suite:
+
+```console
+$ nox
+```
+
+List the available Nox sessions:
+
+```console
+$ nox --list-sessions
+```
+
+You can also run a specific Nox session.
+For example, invoke the unit test suite like this:
+
+```console
+$ nox --session=tests
+```
+
+Unit tests are located in the _tests_ directory,
+and are written using the [pytest] testing framework.
+
+[pytest]: https://pytest.readthedocs.io/
+
+## How to submit changes
+
+Open a [pull request] to submit changes to this project.
+
+Your pull request needs to meet the following guidelines for acceptance:
+
+- The Nox test suite must pass without errors and warnings.
+- Include unit tests. This project maintains 100% code coverage.
+- If your changes add functionality, update the documentation accordingly.
+
+Feel free to submit early, though—we can always iterate on this.
+
+To run linting and code formatting checks before committing your change, you can install pre-commit as a Git hook by running the following command:
+
+```console
+$ nox --session=pre-commit -- install
+```
+
+It is recommended to open an issue before starting work on anything.
+This will allow a chance to talk it over with the owners and validate your approach.
+
+[pull request]: https://github.com/xlorepdarkhelm/plex-playlist/pulls
+
+<!-- github-only -->
+
+[code of conduct]: CODE_OF_CONDUCT.md