Features and Improvements

• Search now uses the v1 scraping API endpoint.
• Moved internetarchive.item.Item.upload.iter_directory() to internetarchive.utils.
• Added support for downloading "on-the-fly" files (e.g. EPUB, MOBI, and DAISY) via ia download <id> --on-the-fly or item.download(on_the_fly=True).

Bugfixes

• s3_is_overloaded() now returns True if the call is unsuccessful.
• Fixed bug in upload where a derive task wasn't being queued when a directory is uploaded.