Add frethandfinger.js to eslint sources
Add frethandfinger.js to eslint sources

Tails/vexflow,aaronmars/vexflow,Tails/vexflow,Silverwolf90/vexflow,Silverwolf90/vexflow,aaronmars/vexflow,aaronmars/vexflow,Tails/vexflow,Huji/vexflow,Huji/vexflow,Silverwolf90/vexflow,Huji/vexflow