Export section as level
So far, Editoria was exporting as
part → chapter → section.
Since we can have multiple naming, we should have abstract export. For example, if you have
Unit → chapter → subsection
It should be exported as section elements with the following classes to be able to reuse templates.
<section class="level-one unit">
<section class="level-two chapter">
<section class="level-three subsection">where unit, chapter and subsection is defined in the wizard and the level allow to manage multiple classes through different naming.