add npm badges

Author: nygardk

README.md

@@ -1,5 +1,8 @@
 # react-loader-advanced
 
+[![npm version](https://badge.fury.io/js/react-loader-advanced.svg)](https://badge.fury.io/js/react-loader-advanced)
+[![Download Count](http://img.shields.io/npm/dm/react-loader-advanced.svg?style=flat-square)](https://npmjs.org/package/react-loader-advanced)
+
 > Show loader overlaying your component during async events.
 
 React-loader-advanced provides a component into which you can wrap