* mes/module/nyacc/lang/sx-util.mes: New file.
* mes/module/nyacc/version.mes: New file.
* mes/module/nyacc/lang/c99/cpp.mes (nyacc): Include them.
* mes/module/nyacc/lang/c99/parser.mes (nyacc): Include them.
* module/mescc/preprocess.scm (need-progress): New function.
(progress): New function.
(insert-progress-monitors): Use them to Integrate progress.
Throughout, make these changes
Copyright headers: GNU Mes
First mention of name: GNU Mes
Website: https://www.gnu.org/software/mes
Git: git://git.savannah.gnu.org/mes.git
