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* feature:copy: Add support for managed copies.
* feature:download: Add support for downloading to a filename, seekable file-like object, and nonseekable file-like object.
* feature:general: Add ``TransferManager`` class. All public functionality for ``s3transfer`` is exposed through this class.
* feature:subscribers: Add subscriber interface. Currently supports on_queued, on_progress, and on_done status changes.
* feature:upload: Add support for uploading a filename, seekable file-like object, and nonseekable file-like object.