ScatterBaseModel to es6 classes.
ScatterBaseModel to es6 classes.

SylvainCorlay/bqplot,ChakriCherukuri/bqplot,dmadeka/bqplot,bloomberg/bqplot,ChakriCherukuri/bqplot,ChakriCherukuri/bqplot,bloomberg/bqplot,bloomberg/bqplot,SylvainCorlay/bqplot,dmadeka/bqplot,SylvainCorlay/bqplot