title: Picasso image loader: loading updated images from url
body: <p>I'm using <a href="http://square.github.io/picasso/" rel="nofollow">Picasso</a> to load images. Some images come from a URL, but sometimes that images change on the server, keeping the same name.
  So, does Picasso understand if the cached images are out of date, even if they have the same file name? Or it just checks if the file name is the same of the one in cache?</p>
  
  <p>Thank you</p>