In neural2d, convolution network layers and pooling layers typically have a depth > 1, where the depth equals the number of kernels to train.
Previously, neural2d imposed certain restrictions on how layers with depth could be connected. The assumption was that if you wanted to go from a convolution network layer to a regular layer, the destination regular layer would have a depth of one.
There was no good reason to impose such a restriction, so neural2d now allows you to define regular layers with depth and connect them in any way to any other kind of layer. This means you can now insert a sparsely connected regular layer in between two convolution network layers with depth > 1 while preserving the depth of the pipeline.