feature #177 Added support for debuging the request performed by Guzzle (javiereguiluz)

This PR was squashed before being merged into the 1.0-dev branch (closes #177).

Discussion
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Added support for debuging the request performed by Guzzle

This is useful to spot connection issues for bugs such as #92.

Commits
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716a98e Added support for debuging the request performed by Guzzle

Author: javiereguiluz

src/Symfony/Installer/DownloadCommand.php

@@ -181,15 +181,19 @@ protected function checkProjectName()
      */
     protected function getGuzzleClient()
     {
-        $options = array();
+        $defaults = array();
 
         // check if the client must use a proxy server
         if (!empty($_SERVER['HTTP_PROXY']) || !empty($_SERVER['http_proxy'])) {
             $proxy = !empty($_SERVER['http_proxy']) ? $_SERVER['http_proxy'] : $_SERVER['HTTP_PROXY'];
-            $options['proxy'] = $proxy;
+            $defaults['proxy'] = $proxy;
         }
 
-        return new Client($options);
+        if ($this->output->getVerbosity() >= OutputInterface::VERBOSITY_DEBUG) {
+            $defaults['debug'] = true;
+        }
+
+        return new Client(array('defaults' => $defaults));
     }
 
     /**