Time to reach Accurate about webgazer

[jeffhuang]

would be cool to even just output a confidence value with the predictions

[RobinReborn]

I've added some basic code to ridgeReg.js that does this

webgazer.reg.RidgeReg.prototype.addData = function(eyes, screenPos, type) {
. . .

if (type === 'click') {

. . .

   let prediction = this.predict(eyes);
   this.totalError += Math.sqrt(Math.pow(prediction.x - screenPos[0],2) + Math.pow(prediction.y - screenPos[1],2))`

Unfortunately when I examine the average error, it's around 200 pixels.