Added an easily editable '#defines' area at the top for others who have to enter wires for different types of nodes.
Added an easily editable '#defines' area at the top for others who have to
enter wires for different types of nodes.

nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome