Milestone: https://github.com/nosegraze/book-database/milestone/2?closed=1
- #162 New: Bring back old
[book-grid] shortcode attributes.
- #164 Tweak: Load assets on all pages but allow filter override.
- #165 Tweak: Don't add pagination HTML to shortcodes if there's only one page.
- #159 Tweak: Order "Books in Series" by series position.
