(tumme-create-thumb)

(tumme-create-thumb)
(tumme-thumbnail-display-external, tumme-display-image)
(tumme-rotate-thumbnail, tumme-rotate-original)
(tumme-set-exif-data, tumme-get-exif-data): Use call-process
instead of shell-command.
(tumme-create-thumbnail-buffer)
(tumme-create-display-image-buffer, tumme-display-thumbs)
(tumme-modify-mark-on-thumb-original-file, tumme-display-image)
(tumme-get-exif-data): Use with-current-buffer.
(tumme-display-properties-format)
(tumme-dired-insert-marked-thumbs, tumme-rotate-original)
(tumme-get-exif-file-name)
(tumme-thumbnail-set-image-description, tumme-gallery-generate):
Fit to 80 columns.