Extend Data class to a StructuredTextParser

[tjduigna]

Either a subclass of Data, or a cleverly configured Data object should serve as an example of how to leverage pandas and the Data API to provide a flexible and extensible structured text parsing system.

[rdmontgomery]

Taking another look at this. Would it make sense to put a load method on Numerical, and then inherit some pd.read_csv behavior like we've talked about elsewhere?

[rdmontgomery]

Oh haha this doesn't make much sense because Numerical is pre-pandas intro to the setup. Yea, glad I'm asking rather than coding.

[rdmontgomery]

Maybe got a little confused about how issue numbers and branch names are supposed to work in this repo, but I opened a baby PR to get the conversation moving. #219

[tjduigna]

Hey, thanks for opening a PR! Since this issue was mostly a stub, we can flesh out some design over there.