Add breadcrumbs to url object passed to components

[rglover]

This is cheap to do but a huge boon on productivity for developers who need it. Idea would be to update the url object with something like:

{
  params: { ... },
  path: '/path/to/thing',
  breadcrumbs: [
    { href: '/path', label: 'path', },
    { href: '/path/to', label: 'to', },
    { href: '/path/to/thing', label: 'thing', }
  ]
}

Could also add something into res.render() options to specify a breadcumbLabel or something so you can set the appropriate label in your routes.