Model the path to the specified category within the given tree of categories
Create domain object to represent breadcrumb trail to a given content item
Use the new domain object to render breadcrumbs for categories and articles
Add a Breadcrumb domain object to model a breadcrumb link to a category
Use breadcrumb domain object rather than decorator
Merge pull request #425 from moneyadviceservice/refactor-breadcrumbs

Refactor breadcrumbs