v3 announcement

Author: thinkingserious

README.rst

@@ -12,6 +12,15 @@ Warning
 
 If you upgrade to version ``1.2.x``, the ``add_to`` method behaves differently. In the past this method defaulted to using the ``SMTPAPI`` header. Now you must explicitly call the ``smtpapi.add_to`` method. More on the ``SMTPAPI`` section.
 
+Announcements
+-------------
+
+For users of our `Web API v3 endpoints`_, we have begun integrating v3 endpoints into this library. As part of this process we have implemented a test automation tool, TOX_. We are also updating and enhancing the core library code.
+
+In no particular order, we have implemented a few of the v3 endpoints already and would appreciate your feedback. Please feel free to submit issues and pull requests on the `v3_beta branch`_. 
+
+Thank you for your continued support! 
+
 Install
 -------
 
@@ -408,3 +417,6 @@ MIT License
 .. _Category: http://sendgrid.com/docs/Delivery_Metrics/categories.html
 .. _Unique Arguments: http://sendgrid.com/docs/API_Reference/SMTP_API/unique_arguments.html
 .. _Filter: http://sendgrid.com/docs/API_Reference/SMTP_API/apps.html
+.. _`Web API v3 endpoints`: https://sendgrid.com/docs/API_Reference/Web_API_v3/index.html
+.. _TOX: https://testrun.org/tox/latest/
+.. _`v3_beta branch`: https://github.com/sendgrid/sendgrid-python/tree/v3_beta