title: How to reinitialize flexslider for a dynamic loading
body: <p>I got a problem with flexslider, I need to download my picture in base64 from a webservice.
  After the download is complete, I make an <code>.append()</code> to add my slide...</p>
  
  <p>But sometimes, everything is added perfectly but the slider doesn't reload correctly 
  So I get code like this :
  <img src="https://i.stack.imgur.com/vmKIX.png" alt="screen1"></p>
  
  <p>instead of code like this :
  <img src="https://i.stack.imgur.com/BENCA.png" alt="screen2"></p>
  
  <p>How can I reinitiate my slider in this case ?</p>