Merge pull request #168 from guardian/db-rt/update-readme-add-npm-badge

Add scala and npm badges to readme

README.md

@@ -2,7 +2,8 @@
 
 This is the Thrift definition of the Content Atom model, and the published versions of this repository are built from the autogenerated code in various languages.
 
-[![Maven Central](https://maven-badges.herokuapp.com/maven-central/com.gu/content-atom-model-thrift/badge.svg)](https://maven-badges.herokuapp.com/maven-central/com.gu/content-atom-model-thrift)
+[![content-atom-model Scala version support](https://index.scala-lang.org/guardian/content-atom/content-atom-model/latest-by-scala-version.svg?platform=jvm)](https://index.scala-lang.org/guardian/content-atom/content-atom-model)
+![NPM Version](https://img.shields.io/npm/v/%40guardian%2Fcontent-atom-model)
 
 ## Adding a new atom type