Lines starting with "#" are ignored.
-Photo meta-data (gallery.meta in PhotoDir)
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+Photo meta-data (PhotoDir/gallery.meta or CacheDir/cache.meta)
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Perl Storable containing a single hash.
$meta->{photo}->{$identifier} is a hash of:
xf transformation applied
w width after scaling
h height after scaling
+ title photo title
+
+The rest is present in cache.meta only:
+
+$meta->{sequence} is an array of photo IDs as they appear in the gallery.
+
+$meta->{thumb}->{$format}->{$identifier} is a hash of:
+ w thumbnail width
+ h thumbnail height