adds licensing and groups link to README

Author: mustafaiman

README.adoc

@@ -64,3 +64,19 @@ HazelcastClient.newHazelcastClient().then(function(client)  {
     console.log(value);
 });
 ----
+
+== Mail Group
+
+Please join the mail group if you are interested in using or developing Hazelcast.
+
+http://groups.google.com/group/hazelcast
+
+=== License
+
+Hazelcast is available under the Apache 2 License. Please see the http://docs.hazelcast.org/docs/latest/manual/html-single/hazelcast-documentation.html#license-questions[Licensing appendix] for more information.
+
+=== Copyright
+
+Copyright (c) 2008-2016, Hazelcast, Inc. All Rights Reserved.
+
+Visit http://www.hazelcast.com[www.hazelcast.com] for more info.