title: Path Error when including a .jade file in a template
body: <p>folder structure:</p>
  
  <pre><code>./jglobal/common.jade
  ./site1/template.jade
  </code></pre>
  
  <p>template.jade:</p>
  
  <pre><code>doctype html
  html(lang='#{meta.lang_code}')
    head
      include ../jglobal/common
  </code></pre>
  
  <p>When I render the template via commandline mode, I got this error:</p>
  
  <p><code>the "filename" option is required to use "include" with "relative" paths</code></p>
  
  <p>Thanks for any kind of tips!</p>