added view padding and marker size
added view padding and marker size

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