Transforms TRstParseOptions into strtabs options. Refs #23.
Adds parser options test. Refs #23.
Replaces default rst configuration with embedded file. Refs #23.
Adds disabled parser options to embedded configuration. Refs #23.
Hardens parsing options test. Refs #23.
Updates C error API to pass specific or global config. Refs #23.
Adds missing subexe keys to all render outputs. Refs #23.
Documents task in changes log. Refs #23.
Merge branch 'feature/t23_export_trst_parse_option'