A utility for exporting pages from a Bookstack wiki using the API. Can keep the wiki's existing tree structure intact by making folders from Shelves, Books, Chapters and attachments (including attachments from external links). Can export multiple formats at once. Experimentally, it can update markdown files before saving them to point to the downloaded image files instead of remote urls. The authorization token is loaded from a text file. Can set a custom HTTP User-Agent header to bypass filtering based on that header.