Fix for missing options on class level add_breadcrumbs method.

The class level `add_breadcrumbs` method doesn't allow element options to be passed through - instead it captures all options as before_filter options.

This change allows you to put an options hash strictly for element options into the options hash, and strips it out so that the before_filter options are passed to the before_filter, and the element options are passed to the breadcrumb creator method.