tzcode2001b.tar.gz and tzdata2001b.tar.gz

The files ftp://elsie.nci.nih.gov/~pub/tzcode2001b.tar.gz and ftp://elsie.nci.nih.gov/~pub/tzdata2001b.tar.gz are now available. These include the changes circulated last week on the time zone mailing list by Paul Eggert (modulo jnorgard's typo fix). In addition, tz-art.htm has been htmlified. --ado