[computer-go] 19x19 CGOS

[Olivier Teytaud]

The anchors are:

/usr/games/gnugo --mode gtp --score aftermath --capture-all-dead
--chinese-rules --level 0

/usr/games/gnugo --mode gtp --score aftermath --capture-all-dead
--chinese-rules --level 10

The numbers (1200 and 1800) are arbitrary; all suggestions welcome,
as for the command-line above. I have a trouble with the positional
superko, I'll check that soon.