title: Volt directory can't be written
body: <p>The error I am getting is</p>
  
  <pre><code>Warning: Phalcon\Mvc\View\Engine\Volt\Compiler::compileFile(../app/views/index/index.phtml.php): failed to open stream: Permission denied in /Users/mattstephens/Sites/magpie/public/index.php on line 26 Phalcon Exception: Volt directory can't be written
  </code></pre>
  
  <p>I have declared the volt engine usage in my bootstrap like so</p>
  
  <pre><code>$view-&gt;registerEngines(array(
        '.phtml' =&gt; 'Phalcon\Mvc\View\Engine\Volt'
      ));
  </code></pre>
  
  <p>The mention of line 26 in my code points to the application handle function shown below</p>
  
  <pre><code>echo $application-&gt;handle()-&gt;getContent();
  </code></pre>
  
  <p>Is this a permissions related thing or due to a missing directory?</p>