Add link to ML.NET tutorial.

Add link to ML.NET tutorial that will be used for the demo.

@sonichi for time, since we know when / where our presentation is taking place, do you want me to update this page with that information?

@sonichi for time, since we know when / where our presentation is taking place, do you want me to update this page with that information?

I like that idea. @qingyun-wu

Done. I also updated some of the headings and added the learning objectives. Feel free to suggest any changes.