pep8 fixes and added more docs for lasso sel
pep8 fixes and added more docs for lasso sel

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