Get diff of commits

[meyskens]

This is a feature request: it would be very handy to be able to query the files touched per commit. Maybe adding on that the ability to get either the old and the new blob or a diff of them.

[smola]

This would enable a whole new class of applications, but implementation needs to be designed carefully.

[campoy]

This is actually a very important feature for basically any demo where we analyze what an individual developer wrote.

What lines did they write? How many lines per language?

[erizocosmico]

Do we want this @ajnavarro?

[ajnavarro]

yes, but we didn't agree on how to do it. We should keep this open to keep it in mind.