Colors and glow for individual keys in stave notes.
Fixes issue drawing a stavenote with two consecutive notes on the same line. Sometimes the second note is masked by the first and not visible (i.e. displaced) as expected.
Merge branch 'upstream-colors' of github.com:bpartridge/vexflow
add strokestyle to keystyle options
set key styles on modifers too
Merge pull request #122 from arthurian/master

Correct displacement of stavenote keys on same line.