Make Python classes like Table fully into Rust structs

[JakeRoggenbuck]

Right now we are making Python shell wrapper classes and calling Rust functions inside them. What if we didn't even need these Python shell classes at all? I really think this would speed things up if Python is any significant overhead.

[JakeRoggenbuck]

When you init the Table class, no python is run

The only consideration is Amdahl's law, so it might not benefit us much, especially since we don't init stuff in loops, i.e. constant amount of times

[JakeRoggenbuck]

But we do run functions n times, so we can check to see what happens when you do a function lookup and call for python vs ffi functions