Content Section Metadata

[preaction]

It would be interesting if every section was also able to have frontmatter metadata, like so:

---
title: Document Title
---
class: section-1
images:
    banner: title.jpg
---

First section

---
class: section-2
images:
    banner: section-2.jpg
---

Second section

This would make presentation apps trivial, but could also make for some rich blog templates.