[Nauty] Nauty version 2.2

[Brendan McKay]

* Bulutoglu Dursun A Civ AFIT/ENC <Dursun.Bulutoglu at afit.edu> [050411 10:54]:
> 
> 	
> 	I am going to reference nauty version 2.2 in my paper. I was
> wondering when it was made available.

The first beta version was in Oct 2002 and the final version was
in Oct 2004.

Brendan.