Review dataflow and changes to the data flow in Run 2 lessons

[chrisburr]

It would probably be worthwhile reviewing some of the introductory material to decide what is no longer relevant and talk about what is going to happen in Run 3.

[eduardo-rodrigues]

In this respect: we know that various things fo run 3 will be (rather) different. How is the Starterkit going to evolve? Will there be a "legacy Starterkit" and the "default one" for run 3 and beyond? Mixing the 2 will become a nightmare, I suspect.

I take the point that this split will imply more work but I suspect that's true whether you do this split or continue with a single Starterkit with run-1+2 and run-3 specific bits ;-).