title: Symfony2 Can't install TCPDFBundle with composer
body: <p>On my current symfony 2.2.1 project,  I want to install TCPDFBundle (bundle for generating PDF documents)</p>
  
  <p>My composer.json looks like this:</p>
  
  <pre><code>{
      "name": "symfony/framework-standard-edition",
      "description": "The \"Symfony Standard Edition\" distribution",
      "autoload": {
          "psr-0": { "": "src/" }
      },
      "require": {
          "php": "&gt;=5.3.3",
          "symfony/symfony": "2.2.*",
          "tecnick.com/tcpdf": "*"
      },
      "scripts": {
          "post-install-cmd": [
              "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::buildBootstrap",
              "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::clearCache",
              "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::installAssets",
              "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::installRequirementsFile"
          ],
          "post-update-cmd": [
              "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::buildBootstrap",
              "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::clearCache",
              "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::installAssets",
              "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::installRequirementsFile"
          ]
      },
      "config": {
          "bin-dir": "bin"
      },
      "minimum-stability": "alpha",
      "extra": {
          "symfony-app-dir": "app",
          "symfony-web-dir": "web",
          "branch-alias": {
              "dev-master": "2.2-dev"
          }
      }
  }
  </code></pre>
  
  <p>So after a long time waiting for cloning, it says that time is out. </p>
  
  <pre><code>[Symfony\Component\Process\Exception\RunTimeException]
  The process time-out
  </code></pre>
  
  <p>any help for this error?</p>