Code cleanup
Disabled ultra quality mode for CBZ format
Made KindleGen detection more foolproof
Added Manga Cover Database support
Updated Pillow (close #95)
Corruption detection now also delete non-image files (close #99)
Resolved problems with page order on Kobo
Fixed Other profile
Dropped Windows XP support
Prevented hypothetical problems with batch processing
Updated README + version bump
Merge pull request #103 from ciromattia/4.x

Version 4.2