Add "Computer vs. Computer" option
Add "Computer vs. Computer" option

It's sort of silly to watch the computer play against itself, as it plays the
same game every time and makes lots of back-and-forth moves due to the very
simple evaluation function. However, it's still fun to watch the game play out,
with its rapid-fire moves, even though the same color wins every time (run it
for yourself to find out!)

NPN/coerceo