Detect Convergence Rate

[chuckwolber]

Detect convergence rate so that the controlling program can decide if we are stagnating. I am uncertain if we can be temporarily stuck in a local minima that we would eventually get out of, so this feature may also double as a tool for exploring that idea.

I.e. if the learning rate is less than the "width" of a local minima, would that eliminate any hope of getting out of it? We could possibly test this by forcing ourselves into a known local minima and then adjusting the learning rate to see if we bounce out of it.