Sif banner.
Actually use timedelta.
Vehumet banner.
New Nemelex choice selection algorithm.

It no longer tries to avoid repeating race/class at all costs. Instead, it
weights combos by 10^(- # of previous choices sharing a race or class).
AC+EV table and clan points.

Was tempted to call these games diesel, but decided against it (except in the
scripts).
Fix typo.

Not sure whether this actually matters, since it's been like this forever...
Update TODO.

Scoring and banners should theoretically all work at this point.