This change from '_default/person.html' to 'persons/term.html' makes for a more
consistent and intuitive approach (IMO) to structuring layouts that involve
taxonomies and terms. If we have a taxonomy and we want to customize either the
taxonomy page or term page, we can create a new directory at 'layouts/taxonomy-name'
and then just add the customized pages 'taxonomy' or 'term' inside it.
