Update README.rst (home-assistant#1981)

Splitting dev and general chat links in the badges

README.rst

@@ -1,4 +1,4 @@
-Home Assistant |Build Status| |Coverage Status| |Join the chat at https://gitter.im/home-assistant/home-assistant|
+Home Assistant |Build Status| |Coverage Status| |Join the chat at https://gitter.im/home-assistant/home-assistant| |Join the dev chat at https://gitter.im/home-assistant/home-assistant/devs|
 ==================================================================================================================
 
 Home Assistant is a home automation platform running on Python 3. The
@@ -92,7 +92,9 @@ section <https://home-assistant.io/help/>`__ how to reach us.
    :target: https://travis-ci.org/home-assistant/home-assistant
 .. |Coverage Status| image:: https://img.shields.io/coveralls/home-assistant/home-assistant.svg
    :target: https://coveralls.io/r/home-assistant/home-assistant?branch=master
-.. |Join the chat at https://gitter.im/home-assistant/home-assistant| image:: https://badges.gitter.im/Join%20Chat.svg
+.. |Join the chat at https://gitter.im/home-assistant/home-assistant| image:: https://img.shields.io/badge/gitter-general-blue.svg
    :target: https://gitter.im/home-assistant/home-assistant?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge
+.. |Join the dev chat at https://gitter.im/home-assistant/home-assistant/devs| image:: https://img.shields.io/badge/gitter-development-yellowgreen.svg
+   :target: https://gitter.im/home-assistant/home-assistant/devs?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge
 .. |screenshot-states| image:: https://raw.github.com/home-assistant/home-assistant/master/docs/screenshots.png
    :target: https://home-assistant.io/demo/