veni sancte: misc formatting fixes (400+ min till now)

i didn't keep track of time till now, but here are some estimations:
- about 100 minutes helping Łukasz get the first version done,
- about 200 minutes fixing Łukasz's sloppy code,
- about 100 minutes adding the topvoice and other new stuff.

Quite probably it took a lot longer, up to 600-800 min in total (!).
veni sancte: add missing intro repeat (3 min)
veni sancte: change margins, correct lyrics (8 min)
veni sancte: lower octave in bass intro end (2 min)
od dźwięku a radka kujawy (72 + 20 min)