EXIF data. Previous logic dictated that all timestamps should
live within attribute name starting with "dateTime", which caused
issues when re-scanning an album (complaining about corrupt cache).
Renamed variable and all is good.
Whenever you had more than one video in a row, it would not
clear the old video before showing the next, resulting in multiple
video frames being shown, only getting cleared whenever a photo
appeared. Big irritation, small fix (-:
Previously thumbs/transcodes were only created if mtime() of
the file didn't match what was stored in the json-file. If you
deleted a thumb/transcode from the cache_path, it would not be
re-created unless you modify the mtime() of the original files