added getNotes()
added MEI elements to vf annotation objects
removed text_width calculation in Vex.Flow.Hyphen
merged other ODDs into main one. Keeping old ones for reference for now.
Merge branch 'new_features' into dev

Conflicts:
	src/vexflow-overrides.js
removed element addition to vexflow articulations
added tstamp support on <dir> elements
added schema
merged with other ODDS, fixed schematron
made most files valid against MEI schematron and against new MEI2VF schema
renamed doc to odd
removed old ODDs
renamed odd and schema
fixed missing xml:id attribute in new common.opt atts class
associated MEI2VF schema
restored ptrref module for meihead support
created readme explaining ODD usage for MEI to VexFlow
added jsdoc + basic support for dynam elements
changed documentation
minor patches