consider merging 1 and 2 group netsim modules

[chad-klumb]

This could save some code now, and possibly set up stratification on > 2 groups down the road.

[smjenness]

Although this code is inefficient from a machine perspective, it is designed this way so that is easier to read from a human perspective (specifically beginning epimodel users). The idea is that users that are unconcerned with multi-group models can dive into the 1 group code and use that as a template more easily than if they had to pull apart a more complex function that used a lot of conditional logic.

That's not to say that all of this is designed as clean and elegantly as it could. If you see room for improvement, go for it. But the underlying architecture of using multiple functions that have some redundancy in them should remain. Thanks!

[chad-klumb]

Okay. I had already pushed some related changes to the refactor_groups branch. I haven't polished them or given them final review, but they convey the basic idea I had in mind for this issue. Changes were made in such a way as to avoid deepening the conditional logic.

I will abstain from further work on this issue unless there's a specific endpoint you'd like me to work towards.