Added PedalMarking class
Added TextBracket class
Formatting fixes.
fixed hard-coded linewidth reset in vex.flow.stem.draw()
Merge branch 'feature/pedal-marking' of https://github.com/Silverwolf90/vexflow into pedals

Conflicts:
	Rakefile
	tests/flow.html
Merge branch 'feature/text-bracket' of https://github.com/Silverwolf90/vexflow into bracket

Conflicts:
	Rakefile
	tests/flow.html