started new graph data structure
working on recursive traversal
still drafting new Node
working on unlinking
Node drafted
added documentation comments to Node
Node abstraction of ArcList passes all tests
finished switching to Node from SignalPropagator
started Neuron class
working on integrating backprop with normal prop
figured out backprop
giving up on general code
network class started
network class added
begun depth updating
realized that changing depth affects output recurrency
using rational numbers for depth
neurons now treated as subexpressions
added refactor ideas
using enum for i/o parameter, letting Linker encapsulate iteration