new "author" class

OK, I found reference to an “author” style, so I’ve decided to go with
that. It’s checked in, along with some more styles (that still need
work).

The schema bit:

The “author” class is similar to the author-date in that it uses

in-text

parenthetical citations. However, unlike author-date, citations do

not

get disambiguated using years and year suffixes. Rather, the style

uses

short titles where more than one reference from a given author is

present (Doe “Some Title”).

AuthorStyle =
attribute class { “author” },
Info,
Terms?,
Defaults,
AuthorDateCitation,
Bibliography

Still need to work out how to configure the formatting in the example
above.

Bruce