Cadeau de Noël en avance

$ hg clone https://bitbucket.org/cedricbonhomme/stegano
$ cd stegano/stegano
$ wget https://lh4.googleusercontent.com/-JsrmdDNU3yQ/TuvK72nZZLI/AAAAAAAADSE/f3yPdaKBLvg/s0/merry-christmas.png
$ python slsb.py --reveal -i merry-christmas.png -b surprise.txt
$ cat surprise.txt