[pdftex] update to pdfbook utility

[Tigran Aivazian]

On Wed, 27 Jul 2005, Jaap Eldering wrote:
> Thus I think that although it's functionality is fully contained in
> the pdfpages package, it still is a convenient wrapper command-line
> utility around that.

The only non-trivial code in pdfbook.c is the one I "stole" (with 
appropriate acknowledgment) from psutils/psbook.c which does the page 
collation in the correct sequence. The reason I wrote that code is because 
I did not know that pdfpages has signature= parameter which has the same 
code written in TeX language.

So, this collation can be done automatically inside pdfpages. Are you 
aware of this? If you are aware of this and still think pdfbook is useful 
then that's fine, I will gladly review your improvements and we'll 
together post it to ctan. But maybe you didn't know about signature= 
parameter of pdfpages and now you know and see that this leaves very 
little, if anything, to the usefulness of pdfbook? Please let me know 
your opinion.

(I can't believe I would ever be arguing that the programs I wrote are 
of no use :)

Kind regards
Tigran