Tweaked the index layout so that it looks better in IE.
(16 Sep 2006) basename
added file_basename to the meta data for images.
(16 Sep 2006) new files check
improved the "new files only" algorithm to check for both
new and missing files in the current directory and to rebuild all
the HTML files in that directory if there is a new or missing file,
since the index will need changing but also the image HTML files because
of the prev/next links.
improved some documentation
new get_image_info method, so that (a) it can be overridden
and (b) so that kg_image_info can use it, so it is always using the
same data as khatgallery is.
(9 Aug 2006) improvements
documentation of khatgallery script
graceful recovery if Image::Info fails when calculating thumbnail size