since that's a little different in cuDNN.  I also removed my CUDA code for
doing batch normalization and replaced it with cuDNN's new batch normalization
methods.

Finally, I forgot to add a convolutional option to the bn_ object.  Now it has
one so you can set the mode however you like, either BATCH_NORM_FC or
BATCH_NORM_CONV.

it to use the saved average mean and invstd to scale the data instead of
normalizing the batch.

with other parts of the library.

spec says it should.

cudnnAddTensor() function and updated the specs and asserts accordingly.

kernel was still running.

CUDA version of add_bias_gradient().

batch_normalize_conv.

of add to them so that it's consistent with how the layer interface expects
this to be done.