Load pre-sorted datasets in documentation notebooks

[wilsonbb]

In our TAPE documentation notebooks, we encounter warnings when loading datasets where divisions are not set.

We can ensure that the Ensemble has divisions and avoids those warnings by using sorted=True for pre-sorted data or sort=True for unsorted data.

To avoid having to sort data in our tutorial notebooks, we can pre-sort our datasets (like s82_rrlyrae which is currently unsorted) and then use the sorted=True flag

[dougbrn]

I went about this a slightly different way, by having the from_dataset function sort them as part of the ingest function. I think we can close this as a result, and with #415.