tuupola/jquery_lazyload — pull request #207 by jmahony (2014-07-09 10:20:05+00:00)
Title: Add URL rewriter function

Added function to rewrite the URL before the images src is updated, for example:

```
$("img.lazy").show().lazyload({
url_rewriter_fn: function (url) {
if (window.devicePixelRatio >= 2) {
url = buildRetinaUrl(url);
}
return url;
}
});
```