Fix to allow Redirect::to('/path') path beginning with a slash

Given that Redirect::to('/'); redirects to the root, it'd make intuitive sense that Redirect::to('/about'); should redirect to the about page, but it doesn't. Currently only Redirect::to('about'); does. This update allows both Redirect::to('/about'); and the existing Redirect::to('about'); to work as expected and redirect to the about page.