title: Browsing page siblings through next/previous links
body: <p>I'm using WordPress as CMS for a site I'm developing. When I'm browsing posts, I can use Next/Previous links to walk between posts. I want to have the same thing on pages.</p>
  
  <ul>
  <li>Page A</li>
  <li>Page B</li>
  <li>Page C</li>
  </ul>
  
  <p>Page A should link to next sibling Page B. Page B should link to previous sibling Page A and next sibling Page C. Page C should link to previous sibling Page B.</p>
  
  <p>Is there any plugin you can recommend that generates these links? I know there are <a href="http://wordpress.org/extend/plugins/next-page/" rel="noreferrer">some</a> plugins that do this, but I specifically want one that hooks into my current theme automatically. I know how to edit the theme, but that would brick my site whenever a theme update is available.</p>
  
  <p>I'm using the <a href="http://wordpress.org/extend/themes/lightword" rel="noreferrer">LightWord</a> WordPress theme.</p>