No channel in ConvDepthWise

It seems like ConvDepthWise is broken because the number of channels is not specified at construction. Producers are created but are empty! This is not consistent with Conv, where both input and output channels are specified. For FC, only output channels are specified.

In summary, ConvDepthWise is definitely broken for now, and there is no consistency about input/output channels specifications!

We already had this kind of discussion and I though we agreed that all the dimensions required for the parameters (weights) must be specified.

• Do we agree to require input and output channels at construction?
• If we disagree, expected behavior is: ...