Update readme - moved logo to top, added license and other badges

Author: pushkyn

README.md

@@ -1,4 +1,10 @@
-[![Build Status](https://travis-ci.org/sendgrid/java-http-client.svg?branch=master)](https://travis-ci.org/sendgrid/java-http-client) [![Maven](https://maven-badges.herokuapp.com/maven-central/com.sendgrid/java-http-client/badge.svg)](https://maven-badges.herokuapp.com/maven-central/com.sendgrid/java-http-client)
+![SendGrid Logo](https://uiux.s3.amazonaws.com/2016-logos/email-logo%402x.png)
+
+[![Build Status](https://travis-ci.org/sendgrid/java-http-client.svg?branch=master)](https://travis-ci.org/sendgrid/java-http-client)
+[![Maven](https://maven-badges.herokuapp.com/maven-central/com.sendgrid/java-http-client/badge.svg)](https://maven-badges.herokuapp.com/maven-central/com.sendgrid/java-http-client)
+[![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/java-http-client.svg)](https://github.com/sendgrid/java-http-client/graphs/contributors)
 
 **Quickly and easily access any RESTful or RESTful-like API.**
 
@@ -136,4 +142,5 @@ java-http-client is guided and supported by the SendGrid [Developer Experience T
 
 java-http-client is maintained and funded by SendGrid, Inc. The names and logos for java-http-client are trademarks of SendGrid, Inc.
 
-![SendGrid Logo](https://uiux.s3.amazonaws.com/2016-logos/email-logo%402x.png)
+# License
+[The MIT License (MIT)](LICENSE.txt)