Scatter bug fix for adding points
Scatter bug fix for adding points

SylvainCorlay/bqplot,dmadeka/bqplot,ChakriCherukuri/bqplot,SylvainCorlay/bqplot,ssunkara1/bqplot,SylvainCorlay/bqplot,ChakriCherukuri/bqplot,ChakriCherukuri/bqplot,rmenegaux/bqplot,bloomberg/bqplot,bloomberg/bqplot,ssunkara1/bqplot,dmadeka/bqplot,rmenegaux/bqplot,bloomberg/bqplot