Potential fix for lp:1268058, waiting for metadata to become writeable on iDevice.
Diagnostic improvements for Windows
Merge branch 'master' of https://github.com/kovidgoyal/calibre
iTunes driver: Retry automatically a few times when failing to send multiple book to iTunes. Fixes #1268058 [Error when trying to send multiple books to iBooks](https://bugs.launchpad.net/calibre/+bug/1268058)

Merge branch 'master' of https://github.com/GRiker/calibre