add badges

README.md

@@ -1,5 +1,8 @@
 # Passport Namchey
-[![Build Status](https://travis-ci.org/namchey/passport-namchey.svg?branch=master)](https://travis-ci.org/namchey/passport-namchey)
+[![npm](https://img.shields.io/npm/v/passport-namchey.svg)](https://www.npmjs.com/package/passport-namchey)
+[![build](https://img.shields.io/travis/namchey/passport-namchey.svg)](https://travis-ci.org/namchey/passport-namchey)
+[![coverage](https://img.shields.io/coveralls/namchey/passport-namchey.svg)](https://coveralls.io/github/namchey/passport-namchey?branch=master)
+[...](https://github.com/namchey/passport-namchey/wiki/Status)
 
 Passport Strategy for Authenticating with Namchey