Added credits

Author: hannesvdvreken

README.md

@@ -138,6 +138,16 @@ if (getenv('APP_ENV') === 'production') {
 $notifier = new Notifier($twilio);
 ```
 
+## Credits
+
+- [Hannes Van De Vreken](https://twitter.com/hannesvdvreken)
+- [Travis Ryan](https://twitter.com/nayrsivart)
+- [All Contributors](../../contributors)
+
+Sponsored by:
+
+![madewithlove](http://madewithlove.be/themes/madewithlove/assets/builds/img/social/opengraph.png)
+
 ### License
 
 laravel-twilio is open-sourced software licensed under the [MIT license](http://opensource.org/licenses/MIT)