Log Message:
Update to 10.18. Should fix PR 27404.

10.18:
This release contains a fix for the floating point
exception on NetBSD-2.0/alpha.
10.17:
This release corrects the formatting of the man page and
restores the correct alpha-linolenic acid reference
value, which was too low in the last release.
10.16:
This release fixes a segfault that occurs when analyzing
added and subtracted foods that total zero calories.
10.15:
This release completes the changing of all calculations
to substitute user averages for program constants in the
values of calories per gram of carb, fat, and protein,
and of the percentage of total fat that is fatty acids.
This means that personal options in terms of percentages
and ratios will be more precise.