Update README.md

Author: JosephP91

README.md

@@ -5,6 +5,13 @@ An object-oriented C++ wrapper for cURL tool
 
 If you want to know a bit more about cURL and libcurl, you should go on the official website http://curl.haxx.se/
 
+Donations
+=========
+
+A beer or a coffe will be appreciated ;)
+
+[![Donate](https://img.shields.io/badge/Donate-PayPal-green.svg)](giuseppe.persico91@gmail.com)
+
 Compile and link
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