Remove stave generation code from measure.js
Remove stave generation code from measure.js

clecap/vexflow-musicxml,ringw/vexflow,clecap/vexflow-musicxml,cute/vexflow-musicxml,lasconic/vexflow-musicxml,clecap/vexflow-musicxml,clecap/vexflow-musicxml,cute/vexflow-musicxml,cute/vexflow-musicxml,lasconic/vexflow-musicxml,lasconic/vexflow-musicxml,cute/vexflow-musicxml