Cache update docs

[jthorton]

Description

This PR adds instructions on how to update the calculation cache with datasets in QCArchive.

Todos

Notable points that this PR has either accomplished or will accomplish.

• Have someone test out the docs

Questions

• Should we provide a function to grab all relevant datasets automatically from QCArchive? Do we want to have to keep this up to date?

Status

• Ready to go

[j-wags]

I've tested locally any this works brilliantly. Thanks @jthorton! I'll update releasehistory and merge.

[j-wags]

Re:

Should we provide a function to grab all relevant datasets automatically from QCArchive? Do we want to have to keep this up to date?

Maybe, but this is already such a huge improvement that I don't want to delay rolling it out :-) Also, QCF is experimenting with some local caching stuff that I'm going to check out right after this. So if we're lucky we may have the option to save a local copy of the common datasets that we distribute in the bespokefit conda package(!!!)