Merge pull request #38 from thepriefy/patch-1

Add Gem badge to the README file

Author: Matt Bernier

README.md

@@ -2,6 +2,7 @@
 
 [![BuildStatus](https://travis-ci.org/sendgrid/ruby-http-client.svg?branch=master)](https://travis-ci.org/sendgrid/ruby-http-client)
 [![Email Notifications Badge](https://dx.sendgrid.com/badge/ruby)](https://dx.sendgrid.com/newsletter/ruby)
+[![Gem Version](https://badge.fury.io/rb/sendgrid-ruby.svg)](https://badge.fury.io/rb/sendgrid-ruby)
 [![MIT licensed](https://img.shields.io/badge/license-MIT-blue.svg)](./LICENSE.txt)
 [![Twitter Follow](https://img.shields.io/twitter/follow/sendgrid.svg?style=social&label=Follow)](https://twitter.com/sendgrid)
 [![GitHub contributors](https://img.shields.io/github/contributors/sendgrid/ruby-http-client.svg)](https://github.com/sendgrid/ruby-http-client/graphs/contributors)
@@ -98,4 +99,4 @@ ruby-http-client is guided and supported by the SendGrid [Developer Experience T
 ruby-http-client is maintained and funded by SendGrid, Inc. The names and logos for ruby-http-client are trademarks of SendGrid, Inc.
 
 # License
-[The MIT License (MIT)](LICENSE.txt)
+[The MIT License (MIT)](LICENSE.txt)