quick fixes for noise_ceiling
quick fixes for noise_ceiling

 - allow NoiseCeiling's parameter to be set at initialization (instead
   of always being random). useful for loading in previously-trained
   model

 - properly compute the loss that we display on the figure by checking
   the model's loss on the whole dataset

billbrod/spatial-frequency-preferences,billbrod/spatial-frequency-preferences,billbrod/spatial-frequency-preferences