change format of printed table.  add restart command

Isaac,

I made a couple of changes during class today.

I'm not sure that you can correctly receive a message.  Your program seemed to crash on incoming messages.

Also in the routing logic, one thing to check is that in the graph I used today, there were times when there was a cheaper route to one direct neighbor through another neighbor.  That seemed to foul up some of the other routers.

I also added the restart message.  We talked about this new message last friday when you were gone.

Brad