[x] some script images (small ones?) displayed at wrong scale scale in the browser (but okay when printed)
[x] Activity toggles [x] Activity filters [x] Compatible boards checkbox [x] Activity pagination [x] Thumbnail
[x] Links to available translations [x] What to do with missing images when switching locales?
[x] Separate page locale selector and activity locale selector [x] Refactor buildTemplates and buildActivity (they share a big chunk of code) [x] Build activity card and teacher's guide when present [x] Copy activity files to dist directory [x] Build relationship with other locales for this same card
[x] Locale string parameters