Rename pull example

Author: clue

examples/stream.php examples/pull.phpexamples/stream.php renamed to examples/pull.php

@@ -6,6 +6,7 @@
 use Clue\React\Docker\Factory;
 
 $image = isset($argv[1]) ? $argv[1] : 'clue/redis-benchmark';
+echo 'Pulling image "' . $image . '" (pass as argument to this example)' . PHP_EOL;
 
 $loop = LoopFactory::create();
 
@@ -14,7 +15,7 @@
 
 $client->imageCreate($image)->then(
     function ($response) {
-        echo 'response: '; var_dump($response);
+        echo 'response: ' . json_encode($response) . PHP_EOL;
     },
     'var_dump',
     function ($info) {