old Sunday responsories deleted

responsories created before the traditional Gregorian formulas were adopted;
I considered preserving them as a second choice, but they were not good.
normalize mode name
notices
mode changes: fake IV alt. and peregrinus fixed

(cherry-pick from variationes with conflicts)
Conflicts:
	antifony/ferie_kantevgant.ly
	antifony/tyden1_1nedele.ly
	antifony/tyden2_1nedele.ly
	antifony/tyden2_2pondeli.ly
	antifony/tyden2_6patek.ly
	antifony/tyden3_5ctvrtek.ly
	antifony/tyden4_1nedele.ly
notices addressing fixed issues removed
notices