Photo album directory and disc format:

Photo album images are kept in ~/images$n/ with a symbolic link
~/public_html/images$n -> ../images$n, except on Bodhi it's not a link,
it's an actual directory.  Each image directory has an index.html file
with anchors pointing to ./$topic/index.html.  Each directory's index
file also has inter-directory anchors to all the directories.

On Bodhi all the above files are present, but the topic directories are
online only for the most recent items.

Each image directory is backed up on a Zip disc (100 Mb).  (Going over
100 Mb is the cue to start a new directory.)  It has a vfat filesystem.
The topic directories include the orig subdirectories.  There are distfiles
for getting data on and off the disc.