Reorganize docs

[ansuz]

Users should be able to start at the front page with zero knowledge, and proceed sequentially, ending with enough knowledge to install, configure, and run cjdroute without assistance.

[ansuz]

I've created a config directory, which should house everything about configuring cjdns, as well as the host system.

[kylerchin]

Seems interesting. I think I can do it.

[ansuz]

If you want to work on this, I'd advise joining irc and discussing what's needed.