Merged
requested to merge github/fork/joe-watkins/joe-watkins/add-labels-to-checklist-fieldsets into gh-pages
Created by: joe-watkins
Per @svinkle 's great idea in https://github.com/a11yproject/a11yproject.com/pull/524#issuecomment-326824212
Adding aria-labelledby to <fieldset> along with a unique id to each <legend> so SR will announce each section when focused from TOC nav.