side-by-side scikit-learn and h2o4gpu

[pseudotensor]

Include side by side examples of scikit and h2o4gpu. Can start of with comparing GLM in scikit vs GLM in h2o4gpu, XGBoost, and K-Means in scikit vs K-Means in h2o4gpu .

Show results and timing for each.

kmeans: @mdymczyk glm, tsvd, pca: @navdeep-G gbm: @pseudotensor

[khevn]

Do the side-by-side examples need to be in README or in a separate notebook?

[pseudotensor]

Hi Karen, Ask Angela. Should be like h2o-3 docs where you can click button on webpage and see either (say) python or R versions. For us it would be scikit or ours. It should also show results as pasted in.