Replaces the given element with a fresh copy fetched from the server.
up.on('new-mail', function() { up.reload('.inbox') })
Unpoly remembers the URL from which a fragment was loaded, so you don't usually need to give an URL when reloading.
See options for up.replace()
up.replace()
The URL from which to reload the fragment. This defaults to the URL from which the fragment was originally loaded.
