Add support for option of Breadcrumbs.

We can't set freedom attributes to breadcrumbs now.
This pull request is way of solving it.

example)
```ruby
breadcrumb.set_home("/custom", "Custom Home Page", :id => "home-id")
breadcrumb.add :foo, "/foo", "Foo Link", :id => "foo-id", :class => "foo-class"

breadcrumbs(breadcrumb, true, "custom-active", :id => "breadcrumbs-id", :class => "breadcrumbs-class")
```

Please, review my code.