Be able to provide a Route object when using $app->route()

[emersion]

Be able to do something like:

$route = new Route('/{any}', array(), array('any' => '.*'));
$app->route($route, $server);

Custom route rules like regular expressions are not supported for now. A little patch in App can fix that. I already implemented it, but I would like to have your advice.

[cboden]

Closing in favour of discussing in #239