TODO

Layer reference

In links JS, add layers' short_description as title attribute

Down the line

It'd be cool to have sync-layers.R report on the number of annotations and/or a sampling of the most common annotations.

Glossary

Create JS that makes the incontext links work

Style

Set #main-content > main min-height so the footer never appears in the middle of the page (e.g., 404 page: https://djvill.github.io/APLS/files/blah%20blah)
- Something to do with finding height of
  + and maybe also .main-header and doing some math
404 issue link: Prefill some values (isaacs/github#99 (comment))

Fun but not necessary

Callouts: Add icon to ::before based on (e.g.) site.note.icon
- This is tricky because it's an SVG and it's hard to target ::before w/ JS.
- Prob easier in CSS/Sass if Liquid variables allowed there