sample composition, my day of carnage by oliver searle
test of minidom xml parsing of musicxml
get everything from a single musicXML part via music21
can do better/be more pythonic
but only print the note elements
really want duration for now
can do better/simpler with music21
again we can do better with music21 functions
standard on quarter length numbers
put timings in a structure
output struct (renamed) to json