Opens a CSV file and returns a writer object. Use maxent_csv_write,
maxent_csv_write_num, maxent_csv_write_row, and
maxent_csv_write_close to write data and close the file.
Opens a CSV file and returns a writer object. Use maxent_csv_write,
maxent_csv_write_num, maxent_csv_write_row, and
maxent_csv_write_close to write data and close the file.