Added link to "native" ES client

docs/community/clients.asciidoc

@@ -70,7 +70,7 @@ See the {client}/php-api/current/index.html[official Elasticsearch PHP client].
 
 * https://github.com/searchbox-io/Jest[Jest]:
   Java Rest client.
-
+* There is of course the [native ES Java client](http://www.elasticsearch.org/guide/en/elasticsearch/client/java-api/current/index.html)
 
 [[community-javascript]]
 === JavaScript