Rename examples and update some comments.

[ci skip]

examples/pipelining_commands.php

@@ -0,0 +1,45 @@
+<?php
+
+/*
+ * This file is part of the Predis package.
+ *
+ * (c) Daniele Alessandri <suppakilla@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+require __DIR__.'/shared.php';
+
+// When you have a whole set of consecutive commands to send to a redis server,
+// you can use a pipeline to dramatically improve performances. Pipelines can
+// greatly reduce the effects of network round-trips.
+
+$client = new Predis\Client($single_server);
+
+$responses = $client->pipeline(function ($pipe) {
+    $pipe->flushdb();
+    $pipe->incrby('counter', 10);
+    $pipe->incrby('counter', 30);
+    $pipe->exists('counter');
+    $pipe->get('counter');
+    $pipe->mget('does_not_exist', 'counter');
+});
+
+var_export($responses);
+
+/* OUTPUT:
+array (
+  0 => Predis\Response\Status::__set_state(array(
+    'payload' => 'OK',
+  )),
+  1 => 10,
+  2 => 40,
+  3 => true,
+  4 => '40',
+  5 => array (
+    0 => NULL,
+    1 => '40',
+  ),
+)
+*/