I perform LIFE on a 200 by 79 cell universe using string universes and
logical bitwise operations on strings.  I only display an 80 x 20 chunk
of this universe (to keep displayed edge artifacts to a minimum).  Since
Perl does logical operations on strings very quickly (a tight C loop),
this ends up being faster than actually iterating in Perl for many patterns.

One nice thing about this algorithm is that it is perhaps the smallest
number of logical operations possible, and it uses only |, ^, and & (no
negation).  Total number of logical operations is only *19*.
