EventLink.params contains pitch name, slur nesting level, and/or hairpin parameters
in StaffInfo.js now new_staffDef spelled correctly.
start new system after <sb/>
full scoreDef in MeterChange test
added tests for changing staffDef; some bug fixes
system breaks: calculate measure width according to number of measure in the system.
@tie @slur handle system breaks
FIXED: terminate tie disregards octave)
added tests for ties in multiple layers, and witin chords
Merge pull request #19 from raffazizzi/master

Creating xml:ids when missing. Includes test.
Merge branch 'master' of https://github.com/zolaemil/MEItoVexFlow
Merge branch 'system_break'

Conflicts:
	tests/tests.html
Stave Connectors; with tests

added @symbol to staffGrp in Prokofiev test;
tests for previous commit
imroved test environment: adjustable canvas test width and height
modified default test height so that a single-system of double-stave fits in the default.
StaveVoices prototype, new test case for adjusting voices
use StaveVoices to format all voices at once.

Not working properly.
Some XML validation issues fixed
Added a complex test case for demo purposes.

Corrected a misspelled mRest
Started encoding Isaac eaxmple
added support for alto and tenor clefs
Merge pull request #20 from raffazizzi/master

added support for alto and tenor clefs