R1:730fe53dfa30

Move child loading into DivinerAtomQuery and collect/organize more data on class Atoms

Summary:
Ref T988. This is //extremely// rough looking in the UI, but gets most of the information we need into the right places.

The controller rendering code is super rough too, I'm going to break that up shortly.

- Add `needChildren()` to `DivinerAtomQuery`.
- Compose and organize class methods when rendering classes. The old Diviner was not smart enough to do this, so a class would only document methods which…