org-sudoku.el

Hi,

my daughter got stuck with a couple of SUDOKU puzzles during
the vacation (where wh had no internet connection), so I
hacked a small SUDOKU solver that reads
a 9x9 Org table and solves it as a sudoku puzzle.
A little silly, but maybe fun for someone - I have pushed it
into the contrib/lisp directory.

Cheers

- Carsten