Reload code in app/uploaders in development
Refactor Attachment.parliamentary_sessions
Refactor Attachment#price
Create separate FileAttachment and HtmlAttachment models
Migrate HtmlVersion to HtmlAttachment
Move HtmlVersionsController into AttachmentsController
Update editions#show to work with HTML attachments
Remove the HtmlVersion model
Fixed tests broken by HtmlVersion -> HtmlAttachment refactor
TEST ME