Add div support in toc-nav unwrapping so that top-level elements without classes won't cause the epub to not validate
Add div support in toc-nav unwrapping so that top-level elements without classes won't cause the epub to not validate

Connexions/cnx-recipes,Connexions/cnx-recipes,Connexions/cnx-rulesets,Connexions/cnx-rulesets,Connexions/cnx-rulesets,Connexions/cte,Connexions/cte,Connexions/cnx-rulesets,Connexions/cnx-recipes,Connexions/cnx-recipes,Connexions/cnx-recipes