Bas Veeling

I haven't trained with tensorflow yet but I'll look into it. In the meantime, try using theano with cnmem enabled (`THEANO_FLAGS='lib.cnmem=1' KERAS_BACKEND=theano python wavenet.py`)

I was wondering why keras was requiring the dilation values to be equal in both dimensions when using tensorflow; it uses `tf.nn.atrous_conv2d`. Thanks for the heads up, and nice work...

I'm closing this with the assumption that this is probably fixed in tensorflow by now. If not, please let me know.

@meridion Thanks! Would you mind sending a pull request so other users can easily benefit from your fix?