xword-typeset: Update for 2021.
xword-typeset: Update for 2021.

Remove unused variable `clue_width`.
Enable UTF-8 ( https://tex.stackexchange.com/a/8858/126270 ).
Find a better way of fiddling with the page layout.
Discover that `.` is magic to cwpuzzle.sty, and substitute for it.

Quuxplusone/xword