Merge branch 'feature/13' into develop

Author: Raül Pérez

examples/pubsub/sub.php

@@ -4,7 +4,7 @@
 const HOST = "localhost";
 const PORT = 4222;
 
-$c = new Nats\Connection(HOST, PORT);
+$c = new Nats\Connection();
 $c->connect();
 
 $callback = function ($payload) {
@@ -13,4 +13,6 @@
 
 $sid = $c->subscribe("foo", $callback);
 
-$c->wait();
+$c->wait(2);
+
+$c->unsubscribe($sid);