various changes
update stdlib changes
add err msg for absent -f option-param
Dates and times in Hare, on the command line.
$ moment -h
...
$ moment
Mon, 12 Jun 1972 01:00:00 +0000
$ TZ=Pacific/Honolulu moment
Sun, 11 Jun 1972 15:00:00 -1000
Send patches to b@torresjrjr.com.