added mainEntity/Article property, revised BreadcrumbList, removed URL typeof on External Enumeration <dl>
added mainEntity/Article property, revised BreadcrumbList, removed URL typeof on External Enumeration <dl>

msulibrary/bib-template-fiction,msulibrary/bib-template-textbook,msulibrary/bib-template-fiction,msulibrary/bib-template-textbook,msulibrary/bib-template-fiction,msulibrary/bib-template-textbook