Breaking Changes Update

Author: thinkingserious

README.md

@@ -1,5 +1,7 @@
 [![Travis Badge](https://travis-ci.org/sendgrid/sendgrid-python.svg?branch=master)](https://travis-ci.org/sendgrid/sendgrid-python)
 
+Please see our announcement regarding [breaking changes](https://github.com/sendgrid/sendgrid-python/issues/217). Your support is appreciated!
+
 **This library allows you to quickly and easily use the SendGrid Web API v3 via Python.**
 
 Version 3.X.X of this library provides full support for all SendGrid [Web API v3](https://sendgrid.com/docs/API_Reference/Web_API_v3/index.html) endpoints, including the new [v3 /mail/send](https://sendgrid.com/blog/introducing-v3mailsend-sendgrids-new-mail-endpoint).