Read/write xattrs
We use xattrs to store caption and keywords for video files, which exiftool can't handle
Bugfix: Keywords not keywords
Now handling photo and video files separately for metadata
Enhanced: Now handles video and photo files elegantly
Major enhancement: now handles video metadata via xattrs
Major enhancement:

1. Now handles video metadata via xattrs
2. Generates and stores video thumbnail in xattrs
Now handles video thumbnails too (with ffmpeg)
Change to conform with change in what dirbrowse returns
Change to conform with change in what dirbrowse returns
Now using preview instead of quicklook, so we can see video files too
Updating docs