title: Invalidate cache in Picasso
body: <p>I load an image from disk using <a href="http://square.github.io/picasso/">Picasso</a>, e.g., <code>Picasso.with(ctx).load(new File("/path/to/image")).into(imageView)</code>, but whenever I save a new image in that file, and refresh my <code>ImageView</code>, Picasso still has the bitmap cached. </p>
  
  <p>Is it possible to invalidate the cache in Picasso?</p>