VROOM VROOM! We all have that friend we call when we want a wild girls' night out-and for Catwoman, that friend is Harley Quinn. It's a night of hip whips and hot laps at the roller derby, complete with a little road-trip crime. It might even be the type of girls' night that gets sealed with a kiss, if Catwoman's allies back in Gotham can hold down the fort while the Cat's away…