add preset for music schools
add preset for music schools

see https://wiki.openstreetmap.org/wiki/Tag:amenity%3Dmusic_school
digidem/iD,kartta-labs/iD,openstreetmap/iD,ngageoint/hootenanny-ui,openstreetmap/iD,ngageoint/hootenanny-ui,ngageoint/hootenanny-ui,morray/iD,mapmeld/iD,AndreasHae/iD,kartta-labs/iD,morray/iD,openstreetmap/iD,bagage/iD,bagage/iD,kartta-labs/iD,AndreasHae/iD,digidem/iD,mapmeld/iD,bagage/iD,mapmeld/iD,AndreasHae/iD