Update README.md

Author: jonsamwell

README.md

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 Angular (2+) HTTP batching module to reduce the number of HTTP requests and increase performance
 
 [![Build Status](https://travis-ci.org/jonsamwell/ngx-http-batcher.svg?branch=master)](https://travis-ci.org/jonsamwell/ngx-http-batcher)
+[![NPM version][npm-image]][npm-url]
+[![License][license-image]][license-url]
 
 
 One of the biggest, yet relatively unknown performance boosts you will get with modern web applications is to reduce the number of HTTP request an application makes.  All you need to do is configure the batch endpoint with the library and the rest is taken care of!