README.md in createsend-2.1.0 vs README.md in createsend-2.2.0

@@ -63,5 +63,12 @@
       stub_post(@api_key, "subscribers/#{@list_id}.json", "add_subscriber.json")
       custom_fields = [ { :Key => 'website', :Value => 'http://example.com/' } ]
       email_address = CreateSend::Subscriber.add @list_id, "[e-mail]", "Subscriber", custom_fields, true
       email_address.should == "[e-mail]"
     end
+
+## Contributing
+1. Fork the repository
+2. Make your changes, including tests for your changes.
+3. Ensure that the build passes, by running `bundle exec rake` (CI runs on: `1.8.7`, `1.9.2`, `1.9.3`, and `ree`)
+4. It should go without saying, but do not increment the version number in your commits.
+5. Submit a pull request.
\ No newline at end of file