title: Click on "show more" button on nytimes.com with selenium
body: <p>I'm trying to scroll through <a href="http://www.nytimes.com/column/corner-office" rel="nofollow">this</a> page. 
  After scrolling down to the bottom of the page I need to click on the "SHOW MORE" button, but I can't find it with selenium.</p>
  
  <pre><code>self.driver.execute_script("window.scrollTo(0, document.body.scrollHeight);")
  self.driver.find_element_by_class_name('button load-more-button').click()
  </code></pre>
  
  <p>But i get an <code>InvalidSelectorException</code></p>