more Meta option improvements, split calculations and calculators

[mikofski]

This is a continuation of PR #77 and #68. It addresses several issues:

• 78 create model parameters to collect layer parameters and replace some constants like layer_class_names and make them more flexible

• 76 simulation settings that switch or skip calculations, not possible without these changes

• 75 easily repeat (parameterize) calculations

• 63 split calculations

• 62 all layers should use Meta

• 59, #60 and #61 need a calculator class to implement uncertainty propagation to all calculations and simplify redundant code

[anomam]

Hey @mikofski , I reviewed all of the commits the best I could and it looks fine to me. I'm still figuring out a lot of what's going on in the framework so there's a chance I missed something, but I think it is good for merging right now! Are you going to update the documentation in a different PR?

[mikofski]

Yes, I'll update the docs in a separate PR, I think that only fixes to issues in this PR should be added now. Thanks! Should I merge it then?

[anomam]

Yes!