Remove "long-form" nota cambiata detection.
Remove "long-form" nota cambiata detection.

Also refactors code to use else if statements to avoid doing
unnecessary checks.

craigsapp/humlib,humdrum-tools/minHumdrum,humdrum-tools/minHumdrum,craigsapp/minHumdrum,craigsapp/humlib,craigsapp/humlib,craigsapp/minHumdrum,craigsapp/minHumdrum,humdrum-tools/minHumdrum