List of photos (gallery.list)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
One photo per line, tab-separated columns:

	File name (relative to OrigDir in config)
	Identifier (16 hex digits)
	Orientation: one of "l", "r", "d", "."
	Transformation -- sequence of:
		n	normalize contrast
		s	sharpen
		h	equalize histogram
	Title (UTF-8 string)

Lines starting with "#" are ignored.


Photo meta-data (gallery.meta in PhotoDir)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Perl Storable containing a single hash.

$meta->{photo}->{$identifier} is a hash of:
	o		orientation
	xf		transformation applied
	w		width after scaling
	h		height after scaling