add solution 1.5
add solution 1.5

zhenxu66/scipy2015-blaze-bokeh,zhenxu66/scipy2015-blaze-bokeh,ijstokes/bokeh-blaze-tutorial,chdoig/scipy2015-blaze-bokeh,kunalj101/scipy2015-blaze-bokeh,kcompher/scipy2015-blaze-bokeh,ijstokes/bokeh-blaze-tutorial,chdoig/scipy2015-blaze-bokeh,jnovinger/scipy2015-blaze-bokeh,jnovinger/scipy2015-blaze-bokeh,kcompher/scipy2015-blaze-bokeh,kunalj101/scipy2015-blaze-bokeh