Add Snowplow Maintenance Badge (closes #47)

README.md

@@ -1,10 +1,9 @@
-# Node.js Analytics for Snowplow 
+# Node.js Analytics for Snowplow
 
+[![early-release]][tracker-classificiation]
 [![Build Status][travis-image]][travis]
 [![npm version][npm-image]][npm-url]
-<a href="https://coveralls.io/r/snowplow/snowplow-nodejs-tracker?branch=master">
-	<img src="https://coveralls.io/repos/snowplow/snowplow-nodejs-tracker/badge.png?branch=master" height="20px">
-</a>
+[![Coveralls][coveralls-image]][coveralls]
 
 ## Overview
 
@@ -14,9 +13,9 @@ This tracker lets you collect event data from Node.js applications.
 
 ## Find out more
 
-| Technical Docs                       | Setup Guide                   | Roadmap & Contributing  |         
+| Technical Docs                       | Setup Guide                   | Roadmap & Contributing  |
 |--------------------------------------|-------------------------------|-------------------------|
-| [ ![i1][techdocs-image] ][tech-docs] | [ ![i2][setup-image] ][setup] | ![i3][roadmap-image]    |
+| [![i1][techdocs-image]][tech-docs] | [![i2][setup-image]][setup] | ![i3][roadmap-image]    |
 | [Technical Docs][tech-docs]          | [Setup Guide][setup]          | _coming soon_           |
 
 ## Developers
@@ -52,12 +51,17 @@ limitations under the License.
 [license]: http://www.apache.org/licenses/LICENSE-2.0
 
 [travis-image]: https://travis-ci.org/snowplow/snowplow-nodejs-tracker.png?branch=master
-[travis]: http://travis-ci.org/snowplow/snowplow-nodejs-tracker
-[npm-url]: http://badge.fury.io/js/snowplow-tracker
+[travis]: https://travis-ci.org/snowplow/snowplow-nodejs-tracker
+[npm-url]: https://badge.fury.io/js/snowplow-tracker
 [npm-image]: https://badge.fury.io/js/snowplow-tracker.svg
+[coveralls-image]: https://coveralls.io/repos/snowplow/snowplow-nodejs-tracker/badge.png?branch=master
+[coveralls]: https://coveralls.io/r/snowplow/snowplow-nodejs-tracker?branch=master
 
 [tech-docs]: https://github.com/snowplow/snowplow/wiki/node.js-tracker
 [techdocs-image]: https://d3i6fms1cm1j0i.cloudfront.net/github/images/techdocs.png
 [setup]: https://github.com/snowplow/snowplow/wiki/node.js-tracker-setup
 [setup-image]: https://d3i6fms1cm1j0i.cloudfront.net/github/images/setup.png
 [roadmap-image]: https://d3i6fms1cm1j0i.cloudfront.net/github/images/roadmap.png
+
+[tracker-classificiation]: https://github.com/snowplow/snowplow/wiki/Tracker-Maintenance-Classification
+[early-release]: https://img.shields.io/static/v1?style=flat&label=Snowplow&message=Early%20Release&color=014477&labelColor=9ba0aa&logo=data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAMAAAAoLQ9TAAAAeFBMVEVMaXGXANeYANeXANZbAJmXANeUANSQAM+XANeMAMpaAJhZAJeZANiXANaXANaOAM2WANVnAKWXANZ9ALtmAKVaAJmXANZaAJlXAJZdAJxaAJlZAJdbAJlbAJmQAM+UANKZANhhAJ+EAL+BAL9oAKZnAKVjAKF1ALNBd8J1AAAAKHRSTlMAa1hWXyteBTQJIEwRgUh2JjJon21wcBgNfmc+JlOBQjwezWF2l5dXzkW3/wAAAHpJREFUeNokhQOCA1EAxTL85hi7dXv/E5YPCYBq5DeN4pcqV1XbtW/xTVMIMAZE0cBHEaZhBmIQwCFofeprPUHqjmD/+7peztd62dWQRkvrQayXkn01f/gWp2CrxfjY7rcZ5V7DEMDQgmEozFpZqLUYDsNwOqbnMLwPAJEwCopZxKttAAAAAElFTkSuQmCC