TODO

[ ] make 'extract' cmd stream its data directly to stdout
[ ] gzip
[ ] wbStego: 4bpp/8bpp BMP
[ ] openstego
[ ] tmp/steg*/*.bmp
[ ] 4bpp/8bpp BMP
[ ] http://search.cpan.org/~nwclark/Acme-Steganography-Image-Png-0.06/Png.pm
[ ] http://registry.gimp.org/node/25988 - GIMP stego plugin
[ ] zsteg-mask: normalize all to white
[ ] stego by pixels of single color (hackquest on wiki)
[ ] advices on what tool to use
[ ] SilentEye
[ ] chunks length check, as in pngcheck

[ ] CLI: self-describe

[+] auto pixel order for BMP
[+] BMP
[+] zlib

[ ] detect AES from http://punkroy.drque.net/PNG_Steganography/Steganography5.php
[?] http://tobyinkster.co.uk/article/steg-encode/
[+] Sieve of Eratosthenes: http://wiki.cedricbonhomme.org/security:steganography