PostFitShapesFromWorkspace development

[anigamova]

For complicated models with many categories the post-fit plotting can be quite time consuming. The easiest way to speed up the process is to introduce parallelisation.

• Functionality to make post-fit plots only for a sub-set of categories in the datacard
• Parallelise sampling (per-category) with batch submission

It would also be nice to have the following features:

• Combine categories
• Simplify sampling for other observables (not fit templates)

[pkausw]

Hi! I'm happy to contribute to this issue :)