Fix #320

Yup, dirty horrid hack but the result is okay.

docs/contributing.rst

@@ -0,0 +1,52 @@
+.. _contributing:
+
+============
+Contributing
+============
+
+This module was designed for use in education; particularly for young children.
+It is intended to provide a simple interface to everyday components.
+
+If a proposed change added an advanced feature but made basic usage more
+complex, it is unlikely to be added.
+
+Suggestions
+===========
+
+Please make suggestions for additional components or enhancements to the
+codebase by opening an `issue`_ explaining your reasoning clearly.
+
+Bugs
+====
+
+Please submit bug reports by opening an `issue`_ explaining the problem clearly
+using code examples.
+
+Documentation
+=============
+
+The documentation source lives in the `docs`_ folder. Contributions to the
+documentation are welcome but should be easy to read and understand.
+
+Commit messages and pull requests
+=================================
+
+Commit messages should be concise but descriptive, and in the form of a patch
+description, i.e. instructional not past tense ("Add LED example" not "Added
+LED example"). Commits that close (or intend to close) an issue should use the
+phrase "fix #123" where ``#123`` is the issue number.
+
+Backwards compatibility
+=======================
+
+Since this library reached v1.0 we aim to maintain backwards-compatibility
+thereafter. Changes which break backwards-compatibility will not be accepted.
+
+Python
+======
+
+* Python 2/3 compatibility
+* PEP8-compliance (with exceptions)
+
+.. _docs: https://github.com/RPi-Distro/python-gpiozero/tree/master/docs
+.. _issue: https://github.com/RPi-Distro/python-gpiozero/issues