adds licensing and groups link to README
adds licensing and groups link to README

gAmUssA/hazelcast-nodejs-client,gAmUssA/hazelcast-nodejs-client,gAmUssA/hazelcast-nodejs-client,hazelcast-incubator/hazelcast-nodejs-client,hazelcast-incubator/hazelcast-nodejs-client,gAmUssA/hazelcast-nodejs-client