* debian/control, debian/pictor-unload.install, debian/pictor-
  unload.manpages, pictor-rename, pictor-rename.1, pictor-unload:
  - depend on fdupes, to remove duplicate files
  - depend on libimage-exiftool-perl for exiftool
  - add a new tool, pictor-rename, and its manpage
    + rename pictures with a prepended timestamp, YYYY-MM-DD_HH-MM-SS__*
    + use dashes instead of colons in time for compatibility with
      Mac OS X and Windows
  - drastically simplify pictor-unload
    + move naming logic to pictor-rename
    + use fdupes to sensibly remove duplicate images
    + drop card unmounting logic
* debian/control, pictor-rename:
  - bump standards
releasing 2.24
opening 2.25