We still conflate the fieldID, the position in the
array of fields, and whether or not that means the
field is mandatory. But this attempts to clean up
*some* of that, without introducing too much risk.
Recommendation is to avoid using the year nomenclature as this
information is already encoded in the git repo. Avoids needing to
repeatly update.
Also updates AUTHORS.txt from current repo with contributor names
Also fixes a bug where the pretty printer didn't insert
linebreaks for a forest (it assumed a single tree root).
Also further regularises bool and quote formatting.
Like the DSNLEXER header, this has visibility in over 700
files, whereas well under half actually use any of it
(quite a bit, but not all, of it actually via DSNLEXER)
Many places already forward-declare the OUTPUTFORMATTER type,
by doing that for the others, it still possible to use the
non-IO methods without having to see richio.h.
TEMPLATE_FIELDNAMES_LEXER is already forward declared - including the
header too drags DSNLEXER into many files, but it is literally only used
in template_fieldnames.cpp.
