docs(README): Add fancy flags

Author: bitIO

README.md

@@ -1,6 +1,10 @@
 # express-rest-file-server
-[![travis-ci](https://travis-ci.org/bitIO/express-rest-file-server.svg?branch=master)](https://travis-ci.org/bitIO/express-rest-file-server)
+[![Build Status](https://travis-ci.org/bitIO/express-rest-file-server.svg?branch=master)](https://travis-ci.org/bitIO/express-rest-file-server)
 [![Commitizen friendly](https://img.shields.io/badge/commitizen-friendly-brightgreen.svg)](http://commitizen.github.io/cz-cli/)
+[![Version npm](https://img.shields.io/npm/v/express-rest-file-server.svg?style=flat-square)](https://www.npmjs.com/package/express-rest-file-server)
+[![npm Downloads](https://img.shields.io/npm/dm/express-rest-file-server.svg?style=flat-square)](https://npmcharts.com/compare/express-rest-file-server?minimal=true)
+
+[![NPM](https://nodei.co/npm/express-rest-file-server.png?downloads=true&downloadRank=true)](https://nodei.co/npm/express-rest-file-server/)
 
 An express based application, inspired by [mock-file-server](https://github.com/betajs/mock-file-server), to be used as a CRUD file server storing content in the memory (temporal) or in the disk (permanent) of the server.