In tenzing 0.2.0 we renamed the infosheet to contributors_table
in all functions, arguments, and documentation as the new name
better conveys the content and functionality of the table. We also
renamed some other functions as well because of the same reason.
validate_infosheet->validate_contributors_tableread_infosheet->read_contributors_tableinfosheet_template->contributors_table_templateclean_infosheet->clean_contributors_tableprint_roles_readable->print_credit_rolesprint_contrib_affil->print_title_page
