Support residual/skip connections about nn-svg

[alexlenail]

In general, I've been trying to avoid adding support for network layouts that are best specified by code, because tensorboard model graphs already exists. The only diagrams I've seen of resnets so far look like those that tensorboard would support:

Doing some googling now, I saw this diagram which was neat:

What did you have in mind?

[dario-loi]

The second one sure does look very neat! When I originally wrote the post I had something like this in mind:

Which is a very simplistic diagram of an EDSR-inspired network that I spun op on draw.io in a dozen minutes or so (spoiler, the architecture doesn't work).

So not necessarily a very dense network like RDN, just a single skip connection would suffice.