Make interpretation of \chordmode { c:sus c:5 } more conventional

Make interpretation of \chordmode { c:sus c:5 } more conventional


Contains commits:

Run scripts/auxiliar/makelsr.py


Amend snippet single-staff-template-with-notes-and-chords.ly


Change NR to reflect new equivalence of sus and sus4


Change NR to reflect new equivalence of c:5 and c:1.5


Run scripts/auxiliar/update-with-convert-ly.sh


convert-ly rule c:5.x, c:5^x, c:sus -> c:3.5.x, c:3.5^x, c:5


Let \chordmode { c:5 } mean <c' g'> rather than <c' e' g'>


Let c:sus be interpreted as c:sus4