Add a contributing page

Author: stof

contributing.rst

@@ -0,0 +1,25 @@
+Contributing
+============
+
+Reporting issues
+----------------
+
+If your issue affects only a single driver, it should be reported to the
+driver itself.
+Any other issues in the Mink abstraction layer and feature requests should
+be reported to the `main Mink repository`_.
+
+Contributing features
+---------------------
+
+Contributions should be sent using GitHub pull requests.
+
+Any contribution should be covered by tests to be accepted. Changes impacting
+drivers should include tests in the common driver testsuite to ensure consistency
+between implementations.
+
+New features should always be contributed to the `main Mink repository`_
+first. Features submitted only to a single driver without being part of the
+Mink abstraction won't be accepted.
+
+.. _main Mink repository: https://github.com/minkphp/Mink

index.rst

@@ -66,6 +66,7 @@ Learn Mink with the topical guides:
     guides/manipulating-pages
     guides/drivers
     guides/managing-sessions
+    contributing
 
 Testing Tools Integration
 -------------------------