Add nimads module with classes that mirror the spec

[tyarkoni]

FYI @tsalo I've started working on a nimads module that provides lightweight data containers that mirror the spec and are backed by SQLAlchemy. The plan is to eventually split this out into its own package, which will interface directly with the central DB, as we've discussed in the past. But for now I'm just going to include it here, and then maybe rewrite the Dataset class so a lot of the get() methods operate over the Study, Analysis, etc. classes. This will make it easier to do lazy loading, study filtering, etc.

[tsalo]

@tyarkoni is there any chance your nimads module code is still around? I'm wondering if it might be good to try working from that instead of starting from scratch.

[tyarkoni]

IIRC I don't think I had a separate nimads module; what I had was built into the new Neurosynth back-end. I think @jdkent commented most of that code out, but it should still be in there. If you don't find anything that looks right, let me know, and I can check again.

[tsalo]

Thanks! I'll follow up with James then.

[jdkent]

ah, would this be the JSON-LD representation in neurostore?

Here is a commit with the original definitions:

https://github.com/neurostuff/neurostore/blob/26cd210a5ed6efbc7e8b761ff38dabfe95931524/neurostuff/schemas/schemas.py

[jdkent]

this has been completed with the nimad module in NiMARE