Modernize list of video extensions.
Add local media extras.
Support more patterns for extras ("-trailer" style naming, extra directories directly in movie directory).
Ignore manually created VERSION file.
Fix loading of local extras in nested directories on Windows.
Sort local extras in a sane way.
Add a couple more patterns to local extra naming.
Allow local extras (and other local media) for "mutli part" items.
Stack "multi version" items by ignoring everything after the year, using the same logic as the scanner.
Improve error logging.
Don't try to add local extras for TV episodes, add Framework and PMS version checks.