Fixed typo in rft/content.js description. No functionality touched, don't worry!;)
Some more markup and styling changes to make everything more consistent.
Created rft/ui/Breadcrumbs class, first draft of decoupled breadcrumbs system. Still needs a couple of fixes (see comments in file) and requires rft/content to expose "rft/content/goTo" event via connect.publish or topic.publish.
