Add jscs to auto-format code before submit.
Add jscs to auto-format code before submit.

Tails/vexflow,Huji/vexflow,Silverwolf90/vexflow,aaronmars/vexflow,spencerhitch/vexflow_extended,spencerhitch/vexflow_extended,Silverwolf90/vexflow,jmahmud/vexflow,aaronmars/vexflow,jmahmud/vexflow,Silverwolf90/vexflow,jmahmud/vexflow,spencerhitch/vexflow_extended,Huji/vexflow,Tails/vexflow,Tails/vexflow,aaronmars/vexflow,Huji/vexflow