Adds a few badges

Author: Brad Berger

Diff for: README.md

@@ -3,6 +3,10 @@
 [![Build Status](https://semaphoreci.com/api/v1/projects/be573f04-507e-4659-ad3b-0611db2227eb/540401/badge.svg)](https://semaphoreci.com/brad/angular-material-calendar)
 [![Code Climate](https://codeclimate.com/github/bradberger/angular-material-calendar/badges/gpa.svg)](https://codeclimate.com/github/bradberger/angular-material-calendar)
 [![Coverage Status](https://coveralls.io/repos/bradberger/angular-material-calendar/badge.svg?branch=master&service=github)](https://coveralls.io/github/bradberger/angular-material-calendar?branch=master)
+[![Bower](https://img.shields.io/bower/v/material-calendar.svg?style=flat-square)]()
+[![NPM Downloads](https://img.shields.io/npm/dt/angular-material-calendar.svg?style=flat-square)]()
+[![NPM Version](https://img.shields.io/npm/v/angular-material-calendar.svg?style=flat-square)]()
+[![License](https://img.shields.io/npm/l/angular-material-calendar.svg?style=flat-square)]()
 
 A calendar directive for AngularJS and Angular Material Design.
 It's lightweight at ~2.1 kB, and has a lot of configurability.