Add npm badge

Author: samgozman

README.md

@@ -1,4 +1,5 @@
 [![yoptascript v0.3](https://img.shields.io/badge/download-v0.3-brightgreen.svg?style=flat)](https://github.com/samgozman/YoptaScript/archive/v0.3.zip)
+[![yopta npm v0.3](https://img.shields.io/badge/npm-v0.3-blue.svg?style=flat)](https://www.npmjs.com/package/yopta)
 [![contributions welcome](https://img.shields.io/badge/contributions-welcome-brightgreen.svg?style=flat)](https://github.com/samgozman/YoptaScript/issues)
 [![gitter yopta chat](https://img.shields.io/gitter/room/nwjs/nw.js.svg)](https://gitter.im/YoptaScript/Lobby?utm_source=share-link&utm_medium=link&utm_campaign=share-link)
 [![contributions welcome](https://img.shields.io/packagist/l/doctrine/orm.svg?style=flat)](https://github.com/samgozman/YoptaScript/blob/master/LICENSE.txt)