Update README.md

Author: cheton

README.md

@@ -3,7 +3,8 @@
 
 A higher order React component for [Sortable](https://github.com/RubaXa/Sortable).
 
-Demo: http://cheton.github.io/react-sortable
+- Demo: http://cheton.github.io/react-sortable
+- Live coding at webpackbin: http://www.webpackbin.com/VJe8dfMpe
 
 The sample code can be found in the [examples](https://github.com/cheton/react-sortable/tree/master/examples) directory.