Virtual circuit system update

I have mentioned the virtual circuit system that Controlix will be based on before, but it has been a while. However, I finally think that I have it's design nailed down tight, so I am releasing it. That means bringing the design into Controlix at SF.net and starting to think about coding the VC up in SpecC. More work... anyway, I have added the VC-related notes from my Facebook account here as a Wiki page, and updated the front page with the appropriate links. Take a look and see if you can find any mistakes - it should cleanly and clearly reflect the "true nature" of hardware design, all the way from masks and layout to network programmability with switching and routing.