add badges

README.md

@@ -2,6 +2,13 @@
 
 A Yeoman code generator for Adobe I/O Applications.
 
+[![Version](https://img.shields.io/npm/v/generator-aio-app.svg)](https://npmjs.org/package/@adobe/generator-aio-app)
+[![Downloads/week](https://img.shields.io/npm/dw/generator-aio-app.svg)](https://npmjs.org/package/@adobe/generator-aio-app)
+[![Build Status](https://travis-ci.org/adobe/generator-aio-app.svg?branch=master)](https://travis-ci.org/adobe/generator-aio-app)
+[![License](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](https://opensource.org/licenses/Apache-2.0)
+[![Codecov Coverage](https://img.shields.io/codecov/c/github/adobe/generator-aio-app/master.svg?style=flat-square)](https://codecov.io/gh/adobe/generator-aio-app/)
+[![Greenkeeper badge](https://badges.greenkeeper.io/adobe/generator-aio-app.svg)](https://greenkeeper.io/)
+
 ## Use with aio CLI
 
 - `npm install -g @adobe/aio-cli`