PCKG add CONTRIBUTING document to repository and documentation

CONTRIBUTING.rst

@@ -0,0 +1,13 @@
+************
+Contributing
+************
+
+This project is open to any kind of contribution. This spans from issues to documentation to pull requests.
+In order to reduce the amount of work for everyone please try to adhere to good practice.
+
+The pull requests and issues will be prefilled with templates. Please fill in your information where applicable.
+
+This project uses `semantiv versioning <http://semver.org/>`_.
+
+For further best practices and tips on contributing please see the
+`contribution-guide <http://www.contribution-guide.org/>`_.

README.rst

@@ -64,4 +64,4 @@ The full project-documentation is available on `Read the Docs <https://python-es
 Contributing
 ------------
 
-This project is open for any contribution!
+This project is open for any contribution! Please see CONTRIBUTING.rst for more information.

doc/dev/contributing.rst

@@ -0,0 +1 @@
+.. include:: ../../CONTRIBUTING.rst

doc/index.rst

@@ -40,6 +40,11 @@ Content
    user/todo
    user/usage
 
+.. toctree::
+   :maxdepth: 1
+   :caption: Developer Documentation
+
+   dev/contributing
 
 .. toctree::
    :maxdepth: 1