[Docs]Added google groups

README.md

@@ -13,3 +13,9 @@ SonataUserBundle
 
         - new Sonata\UserBundle\SonataUserBundle('FOSUserBundle') : the bundle will extend ``FOSUserBundle``
         - new Sonata\UserBundle\SonataUserBundle() : the bundle will NOT extend ``FOSUserBundle``
+
+
+**Google Groups**: For questions and proposals you can post on this google groups
+
+* [Sonata Users](https://groups.google.com/group/sonata-users): Only for user questions
+* [Sonata Devs](https://groups.google.com/group/sonata-devs): Only for devs