Merge branch 'checkpoint' into 'master'

.dev-js/package.json

.gitignore

.gitlab-ci.yml

.prettierignore

aleksis/apps/paweljong/forms.py

...s/apps/paweljong/frontend/components/event/Checkpoint.vue

aleksis/apps/paweljong/frontend/index.js

aleksis/apps/paweljong/migrations/0001_initial.py

aleksis/apps/paweljong/migrations/0007_terms.py

aleksis/apps/paweljong/migrations/0009_remove_feedback.py

aleksis/apps/paweljong/migrations/0013_info_mailings.py

...apps/paweljong/migrations/0014_move_sent_to_to_through.py

aleksis/apps/paweljong/migrations/0015_registrationstate.py

aleksis/apps/paweljong/migrations/0018_payment_with_tezor.py

aleksis/apps/paweljong/migrations/0021_checkpoint.py

...is/apps/paweljong/migrations/0025_add_managed_by_label.py

aleksis/apps/paweljong/migrations/0026_drop_sites.py

aleksis/apps/paweljong/schema.py

.../apps/paweljong/templates/paweljong/event/checkpoint.html

aleksis/apps/paweljong/templates/paweljong/event/detail.html