A proposed structure for the representation of discrete and continuous objects

[llorracc]

@sbenthall , @albop

I've been thinking about the practicalities of how we might keep track of functions of arbitrary numbers of discrete and continuous dimensions, and wanted to make a proposal intended to start a conversation on that subject.

https://github.com/econ-ark/DARKolo/blob/master/development/Representing_Multidimensional_Discrete-Continuous.ipynb

This is not meant as a concrete proposal, more as just an initial set of thoughts meant to provoke a discussion.