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Progress on #42.
This adds a first prototype for a linear operator of KFAC. It has very limited support (e.g. only
Linear
layers, no weight sharing), but I think this is a good milestone to start off with (and to keep thegit diff
s manageable. The tests compare the per-layer GGN with KFAC for deep linear models withMSELoss
for a large number of MC samples from the predictive distribution.