Mention Platform.sh on README.

GuGuss · weaverryan · commit d28904b0af02 · 2015-07-15T09:04:34.000-04:00
diff --git a/README.markdown b/README.markdown
@@ -14,3 +14,8 @@ Contributing
 We love contributors! For more information on how you can contribute to the
 Symfony documentation, please read
 [Contributing to the Documentation](https://symfony.com/doc/current/contributing/documentation/overview.html)
+
+Platform.sh
+-----------
+
+Pull requests are automatically built by [Platform.sh](https://platform.sh).
