Update README.md

Update readme to address sendgrid#35 and update it like the nodejs README

Author: goteamtim

README.md

@@ -1,4 +1,10 @@
-[![Travis Badge](https://travis-ci.org/sendgrid/php-http-client.svg?branch=master)](https://travis-ci.org/sendgrid/php-http-client)
+[![SendGrid Logo](https://uiux.s3.amazonaws.com/2016-logos/email-logo%402x.png)
+
+[![BuildStatus](https://travis-ci.org/sendgrid/php-http-client.svg?branch=master)](https://travis-ci.org/sendgrid/php-http-client)
+[![Email Notifications Badge](https://dx.sendgrid.com/badge/php)](https://dx.sendgrid.com/newsletter/php)
+[![npm](https://img.shields.io/npm/l/express.svg)]()
+[![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/sendgrid-nodejs.svg)](https://github.com./sendgrid/sendgrid-nodejs/graphs/contributors)
 
 **Quickly and easily access any RESTful or RESTful-like API.**