Create CONTRIBUTING.md from contributing information

This integrates with GitHub's pull request system, better exposing the contributing information to potential contributors.

With LICENSE, closes jdf#130

Author: jeremydouglass

CONTRIBUTING.md

@@ -0,0 +1,28 @@
+## Contributing
+
+Thank you for your interest in contributing to the Python Mode for Processing
+reference documentation and website. We welcome contributions!
+
+To contribute new documentation or fixes to the
+existing documentation, create a fork of the
+[processing-py-site](https://github.com/kazimuth/processing-py-site) repository
+on GitHub. With `git`, create a new branch in your fork and make your changes,
+ensuring that `python generator.py build --all --images` completes without
+errors. When you're done, push your branch to your fork of the project on
+Github, and then issue a Pull Request against the main repository. [Here's a
+good overview of the pull request
+process](https://yangsu.github.io/pull-request-tutorial/) on GitHub. (If you're
+totally unfamiliar with Git or GitHub, [try this
+tutorial](https://try.github.io/).
+
+Pull requests will be automatically tested Travis-CI, and will receive a pass
+or fail mark. If the build fails, please review the log for why. Common reasons
+may include metadata categort checks by generator.py, or generate_images.py not
+generating an image. For troubleshooting, see [README.md](README.md).
+
+All contributions are distributed under the current license, see:
+[LICENSE](LICENSE).
+
+This license is for the website documentation of Python Mode for Processing.
+The Python Mode for Processing software is licensed seperately, currently under
+Apache 2.0.

README.md

@@ -137,18 +137,14 @@ operating system. Then run the build script like so:
 
     xvfb-run python generator.py build --images
 
-## Contributing
+## Reporting Issues
 
-We welcome contributions! To contribute new documentation or fixes to the
-existing documentation, create a fork of the
-[processing-py-site](https://github.com/kazimuth/processing-py-site) repository
-on GitHub. With `git`, create a new branch in your fork and make your changes,
-ensuring that `python generator.py build --all --images` completes without
-errors. When you're done, push your branch to your fork of the project on
-Github, and then issue a Pull Request against the main repository. [Here's a
-good overview of the pull request
-process](https://yangsu.github.io/pull-request-tutorial/) on GitHub. (If you're
-totally unfamiliar with Git or GitHub, [try this
-tutorial](https://try.github.io/).
+Before opening a new issue, please review existing [issues](issues).
 
+Issues should include as many details as possible, including URLs and/or
+excerpts from the related material, and a description of what is missing/wrong
+or could be improved, and if possible how.
 
+## Contributing:
+
+see [CONTRIBUTING.md](CONTRIBUTING.md)