Add flattr button

README.md

@@ -5,7 +5,7 @@
 [![](https://img.shields.io/scrutinizer/g/dirkgroenen/Pinterest-API-PHP.svg)](https://scrutinizer-ci.com/g/dirkgroenen/Pinterest-API-PHP/?branch=master) 
 [![](https://img.shields.io/scrutinizer/coverage/g/dirkgroenen/Pinterest-API-PHP.svg)](https://scrutinizer-ci.com/g/dirkgroenen/Pinterest-API-PHP/?branch=master) 
 [![Packagist](https://img.shields.io/packagist/v/dirkgroenen/pinterest-api-php.svg)](https://packagist.org/packages/dirkgroenen/pinterest-api-php) 
-[![Support me with some coffee](https://img.shields.io/badge/donate-paypal-orange.svg)](https://www.paypal.me/dirkgroenen)
+[![Support me with some coffee](https://img.shields.io/badge/donate-paypal-orange.svg)](https://www.paypal.me/dirkgroenen)  [![Support me with some coffee](https://button.flattr.com/flattr-badge-large.png)](https://flattr.com/submit/auto?fid=j95k2l&url=https%3A%2F%2Fgithub.com%2Fdirkgroenen%2FPinterest-API-PHP)
 -------------------
 
 A PHP wrapper for the official [Pinterest API](https://dev.pinterest.com).
@@ -532,4 +532,4 @@ Returns: `True|PinterestException`
 
 # Examples
 
-There are no examples available yet. Let me know if you have an (example) project using the this library.
+There are no examples available yet. Let me know if you have an (example) project using the this library.