The existing example had an implicit overlap between the host network
and some tenant network, use a different network for the host.
Peering network resized to /24 because usually we would have several
network nodes on it instead of creating each their own transfer/peering
network.
Diagrams adjusted accordingly with omnigraffle.
PNGs reexported with 160% size to approximate the previous ones.
Router IPs in Diagrams adjusted to reflect documentation.
Peering Network IPs added to Peering Session Box.
Change-Id: I8778df02330196a8999afd3bbf9a3b87f0e14f7b
c13fbf1d23