Update README.md

Author: buger

README.md

@@ -52,3 +52,12 @@ gran_digital:
     client_id: 111111111111111111
     api_key: 22222222222222222
 ```
+
+
+## Contributing
+
+1. Fork it
+2. Create your feature branch (git checkout -b my-new-feature)
+3. Commit your changes (git commit -am 'Added some feature')
+4. Push to the branch (git push origin my-new-feature)
+5. Create new Pull Request