Update README.md

Author: fritz-c

README.md

@@ -11,6 +11,7 @@ Features
 - Image Zoom
 - Flexible rendering using src values assigned on the fly
 - Image preloading for smoother viewing
+- Mobile friendly, with pinch to zoom and swipe (Thanks, [@webcarrot](https://github.com/webcarrot)!)
 - No external CSS
 
 ## Example