Treat residual layers like a convolutional layer [1, 1, #filters]
Treat residual layers like a convolutional layer [1, 1, #filters]

- the res_add_layer methods uses the same dimensions as for the previous
layer (output_size, input_size), but filter_size is set to [1, 1],
strides are set to [1, 1] and padding to [0, 0].
- code now also can handle convolutional layers without relu activation

eth-srl/OptOctagon,eth-srl/OptOctagon,eth-srl/OptOctagon