Add Dropzone.js
Basic client-side support for attachments
Flask-uploads and sqlalchemy_imageattach
Basic support for upload attachments
Store PDFs as normal attachments.
Show attachments in article view (basic)
Nicer layout of attachments
Link attachments to doc when editing
Link attachments to new articles
Store PDFs in attachment store
Allow downloading of attachments
Allow attachments to be deleted.
Show upload progress
Move analysis js into own file
Fix warning on zero attachments
Hide attachment drawer when there aren't any
Mark form as dirty when changing attachments
Make it clearer  where the dropzone is
Use S3 as a backend store.
Use Boto to store S3 attachments