Add Patreon badge

readme.md

@@ -13,6 +13,11 @@ Capture screenshots of websites in various resolutions. A good way to make sure
 $ npm install pageres
 ```
 
+<a href="https://www.patreon.com/sindresorhus">
+	<img src="https://c5.patreon.com/external/logo/become_a_patron_button@2x.png" width="160">
+</a>
+
+
 *PhantomJS, which is used for generating the screenshots, is installed automagically, but in some [rare cases](https://github.com/Obvious/phantomjs/issues/102) it might fail to and you'll get an `Error: spawn EACCES` error. [Download](http://phantomjs.org/download.html) PhantomJS manually and reinstall pageres if that happens.*