When adding MOBI files if the author name is in LN, FN format, auto change it to FN LN format. This behavior can be disabled by setting Preferences->Tweaks->Author sort name algorithm to copy. Fixes #1306748 [Author attribute is imported incorrectly when importing Kindle e-book files](https://bugs.launchpad.net/calibre/+bug/1306748)
Conversion: Preserve all guide entries that are of a type present in the EPUB 2.0 specification. These entries are used by newer Kindle readers.