Document exporting of data from dataset

[jenshnielsen]

Planing to also add a more detailed notebook

[codecov]

Codecov Report

Merging #1462 into master will not change coverage.
The diff coverage is n/a.

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[WilliamHPNielsen]

I like it. It's a really good idea to introduce data export/retrieval upfront in the context manager notebook and to sprinkle examples of using it out through the notebook.

Comments on the notebooks:

• The measurement context manager notebook still has an experimental feel to it. Many paragraphs are unchanged since I originally wrote them to convince the world that we could do better than the old Loop. We should rewrite the whole thing into a more authoritative tutorial tone. Perhaps in a separate PR. The changes introduced in this PR are clear improvements.
• The Working-With... notebook is sweet! There is a fair amount of typos, though. I wouldn't mind going through it and fixing them. It's usually faster/easier for another person than the original author to do that.

[jenshnielsen]

Sure that sounds good. I agree that we should rewrite the context manager notebook and it should be more of a getting started kind of thing

[WilliamHPNielsen]

I think this is fine for now.