Merge pull request #416 from gabrielkrell/master

Add release notifications

README.md

@@ -1,6 +1,7 @@
 [![BuildStatus](https://travis-ci.org/sendgrid/sendgrid-php.svg?branch=master)](https://travis-ci.org/sendgrid/sendgrid-php)
+[![Email Notifications Badge](https://dx.sendgrid.com/badge/php)](https://dx.sendgrid.com/newsletter/php)
 
-Please see our announcement regarding [breaking changes](https://github.com/sendgrid/sendgrid-php/issues/290). Your support is appreciated!
+**NEW:** Subscribe to email [notifications](https://dx.sendgrid.com/newsletter/php) for releases and breaking changes.
 
 **This library allows you to quickly and easily use the SendGrid Web API v3 via PHP.**
 
@@ -202,7 +203,7 @@ print $response->body();
 
 Please see our announcement regarding [breaking changes](https://github.com/sendgrid/sendgrid-php/issues/290). Your support is appreciated!
 
-All updates to this library is documented in our [CHANGELOG](https://github.com/sendgrid/sendgrid-php/blob/master/CHANGELOG.md) and [releases](https://github.com/sendgrid/sendgrid-php/releases)
+All updates to this library are documented in our [CHANGELOG](https://github.com/sendgrid/sendgrid-php/blob/master/CHANGELOG.md) and [releases](https://github.com/sendgrid/sendgrid-php/releases). You may also subscribe to email [release notifications](https://dx.sendgrid.com/newsletter/php) for releases and breaking changes.
 
 <a name="roadmap"></a>
 # Roadmap