Added basic scatter plot.
Added basic scatter plot.

XDATA-Year-3/UpSet,syrenio/upset,zhanghuijun-hello/test,XDATA-Year-3/UpSet,zhanghuijun-hello/test,VCG/upset,VCG/upset,syrenio/upset,syrenio/upset,syrenio/powerset,syrenio/upset,syrenio/powerset,zhanghuijun-hello/test,XDATA-Year-3/UpSet,XDATA-Year-3/UpSet,VCG/upset,syrenio/powerset,XDATA-Year-3/UpSet,syrenio/powerset,zhanghuijun-hello/test,VCG/upset