title: django pisa - pagenumber just for two or more pages - show pagenumber of total pages
body: <p>Is there a posibility to show the pagenumber with django pisa just for two or more pages?
  The template for showing up pagenumber looks like this:</p>
  
  <pre><code>&lt;div id="footerContent"&gt;
     &lt;p&gt;Page &lt;pdf:pagenumber&gt;&lt;/p&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p>I think it's necessary to get the number of pages, before they are processed by pisa. Any option to use an if/else statement like this pseudo:</p>
  
  <pre><code>if pages &gt; 1:
   ...
  else:
   ...
  </code></pre>
  
  <p>If you want to display e.g. <strong>Page 1/5</strong> (page one of five) it's also necessary to get the count of pages ?! No solution in pisa for that?</p>