FFNet-level propogation dimensionality testing
    * Arbitrary
        * Wrote sized generators for matching FFNets and PropData
    * NeuralNetwork.Internal
        * Corrected output size (bias element removed)
    * NeuralNetSpec
        * Totality/success tests for FFNet propogation.
        * Not passing yet
FFNet propogation dimension-matching fixed
    * NeuralNet.Internal
        * Corrected inSize, also had off-by-1 same as outSize
    * NeuralNet
        * Added bias back on in backprop since it's peeled off in prop
    * Arbitrary
        * Corrected FFNet sizedGen2 instance to a sizedGen3 (wtf was
          that supposed to be)
        * Created SizedGen3 class for FFNet and MatchNPD
        * Corrected MatchNPD instance
    * NeuralNetSpec
        * Nonempty condition for propdata