Fix: Python 3 compatiblity: Replace use of "file" with "open". Fix: Python 3 compatiblity: Sorting on the Annotations Import dialog. Fix: Python 3 compatiblity: Completed work for tolinos and Kindles. New: Add support for Sony devices. From @Cibes. Fix: Remove references to older calibre IPC code as that was removed in calibre 5.7. Update: Various backend changed that should improve performance.