The layout of this is all CSS with scroll-snap. (Neat!) Also implement a
JavaScript scroll event listener that detects when photos scroll and
updates the caption and photo data.
Refactor a few parts of the photo_exif_table into partials so they can
be reused for the carousel items.
- Move photo_thumbnail.html to photos/thumbnail.html
- Add a photos/list.html partial that returns a list of photos for the current
page
- Use the template above everywhere we need a list of photos for the page
