Function serialize 

pub fn serialize<I: IntoIterator<Item = Op>>(i: I) -> Vec<u8> 

Serialize operations to DVI data bytes.

let ops = vec![
    dvi::Op::Down(256),
    dvi::Op::TypesetChar{char: 'D' as u32, move_h: true},
    dvi::Op::TypesetChar{char: 'V' as u32, move_h: true},
    dvi::Op::TypesetChar{char: 'I' as u32, move_h: true},
];
let data = dvi::serialize(ops);
assert_eq!(data, vec![158, 1, 0, 68, 86, 73]);