title: Add block to all CMS Pages with certain URL Key
body: <p>I'm trying to discover whether this is possible or not.   We have a series of CMS pages that represent our library.</p>
  
  <p>So the URL keys for these pages are something like:</p>
  
  <ul>
  <li>library/</li>
  <li>library/top-ten</li>
  <li>library/five-questions</li>
  <li>library/faq</li>
  <li>etc...</li>
  </ul>
  
  <p>The powers that be want to add a static block that will appear <em>only</em> on library CMS pages.   Is there a way, in a layout XML file, to target all the pages that contain a keyword, so I could do something along the lines of</p>
  
  <pre><code>&lt;default&gt;
      ....
  &lt;/default&gt;
  &lt;library_*&gt;
      &lt;reference name="right"&gt;
          &lt;block goes here/&gt;
      &lt;/reference&gt;
  &lt;/library_*&gt;
  </code></pre>