title: ZF2 skeleton application is throwing 500 error
body: <p>When trying to deploy the skeleton application using the following commands:</p>
  
  <pre><code>git clone git://github.com/zendframework/ZendSkeletonApplication.git
  cd ZendSkeletonApplication
  php composer.phar self-update
  php composer.phar install
  </code></pre>
  
  <p>I get the following error:</p>
  
  <p><code>PHP Fatal error:  Uncaught exception 'Zend\\ServiceManager\\Exception\\InvalidArgumentException' with message 'Provided abstract factory must be the class name of an abstract factory or an instance of an AbstractFactoryInterface.' in /home/web/www/zftests/ZendSkeletonApplication/vendor/zendframework/zendframework/library/Zend/ServiceManager/ServiceManager.php:302\nStack trace:\n#0 /home/web/www/zftests/ZendSkeletonApplication/vendor/zendframework/zendframework/library/Zend/ServiceManager/Config.php(126): Zend\\ServiceManager\\ServiceManager-&gt;addAbstractFactory('Zend\\Cache\\Serv...')\n#1 /home/web/www/zftests/ZendSkeletonApplication/vendor/zendframework/zendframework/library/Zend/ModuleManager/Listener/ServiceListener.php(223): Zend\\ServiceManager\\Config-&gt;configureServiceManager(Object(Zend\\ServiceManager\\ServiceManager))\n#2 [internal function]: Zend\\ModuleManager\\Listener\\ServiceListener-&gt;onLoadModulesPost(Object(Zend\\ModuleManager\\ModuleEvent))\n#3 /home/web/www/zftests/ZendSkeletonApplication/vendor/zendframework/zendframework/library in /home/web/www/zftests/ZendSkeletonApplication/vendor/zendframework/zendframework/library/Zend/ServiceManager/ServiceManager.php on line 302</code></p>