title: Hyperlinks in web.py
body: <p>How do I make web.py fetch a page when I click on a link?
  I have this in my template:</p>
  
  <p><code>&lt;a href='add.html'&gt;Home&lt;/a&gt;</code></p>
  
  <p>When I click on 'Home', I get 'not found'.</p>
  
  <p>In my application, I have '/add' mapped to the 'Add' class which returns 'Boom!' using the template add.html.</p>
  
  <pre><code>urls = ('/', 'Index',
      '/add','Add')
  
  class Add(object):
      def GET(self):
          return render.add('Boom!')
  </code></pre>
  
  <p>I feel when I request for <code>/add.html</code>, the Add class will handle the request and return 'Boom!'</p>
  
  <p>Why do I keep getting 'not found'?</p>