add ci, versioning, and npm badge

README.md

@@ -5,12 +5,11 @@
 
 # Pelias API Server
 
-[![Greenkeeper badge](https://badges.greenkeeper.io/pelias/api.svg)](https://greenkeeper.io/)
-
 This is the API server for the Pelias project. It's the service that runs to process user HTTP requests and return results as GeoJSON by querying Elasticsearch.
 
+[https://npmjs.org/package/pelias-api](https://npmjs.org/package/pelias-api)
+
 [![Gitter](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/pelias/api?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
-[![Build Status](https://travis-ci.org/pelias/api.png?branch=master)](https://travis-ci.org/pelias/api)
 
 ## Documentation
 
@@ -83,3 +82,18 @@ $ curl localhost:9200/pelias/_count?pretty
   ...
 }
 ```
+
+### Continuous Integration
+
+Travis tests every release against Node.js versions `4` and `6`.
+
+[![Build Status](https://travis-ci.org/pelias/api.png?branch=master)](https://travis-ci.org/pelias/api)
+
+
+### Versioning
+
+We rely on semantic-release and Greenkeeper to maintain our module and dependency versions.
+
+[![Greenkeeper badge](https://badges.greenkeeper.io/pelias/api.svg)](https://greenkeeper.io/)
+
+