title: allow child folder in .hgignore
body: <p>Does anyone know if it is possible to ignore a parent-folder in Mercurial and allow a child-folder to commit.<br>
  I have a folder structure like this </p>
  
  <pre><code>www.Project.com
  01 – Consultancy
  02 – Information Architecture
  03 – Content
  04 – Branding
      Fonts
      Guidelines
      Logo
  05 – Design
      Graphics
      Stock Photography
  06 – Code
      Static site
      Wordpress
  07 – Marketing
      Email
      SEO
      Social Media 
  </code></pre>
  
  <p>And I like to ignore the Wordpress folder except;  </p>
  
  <pre><code>06 - Code\Worpdress\wp-content\plugins  
  06 - Code\Worpdress\wp-content\themes  
  </code></pre>
  
  <p>I am also using a code to ignore a global folder  </p>
  
  <pre><code>syntax: glob  
  01 - Ignore/** 
  </code></pre>