Update README.md

Author: gkorland

README.md

@@ -5,6 +5,9 @@
 [![Javadocs](https://www.javadoc.io/badge/com.redislabs/jredisgraph.svg)](https://www.javadoc.io/doc/com.redislabs/jredisgraph)
 [![Codecov](https://codecov.io/gh/RedisGraph/JRedisGraph/branch/master/graph/badge.svg)](https://codecov.io/gh/RedisGraph/JRedisGraph)
 
+[![Mailing List](https://img.shields.io/badge/Mailing%20List-RedisGraph-blue)](https://groups.google.com/forum/#!forum/redisgraph)
+[![Gitter](https://badges.gitter.im/RedisLabs/RedisGraph.svg)](https://gitter.im/RedisLabs/RedisGraph?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge)
+
 # JRedisGraph
 RedisGraph Java client