OK, now we run 'routing' for the nox configurations with loops.

Unfortunately, I can't test this at the moment since nox seems not to
be able to find the routing module.

Added/renamed examples: grid.py, tree1024.py

Added -v flag to nox arguments, so we have some chance of figuring
out why nox is dying, as it generally is.

examples/grid.py

@@ -0,0 +1,17 @@
+#!/usr/bin/python
+
+"Instantiate a Grid network and use NOX as the controller."
+
+from mininet import init, Controller, GridNet, Cli
+
+class NoxController( Controller ):
+   def __init__( self, name, **kwargs ):
+      Controller.__init__( self, name, 
+         controller='nox_core', 
+         cargs='-v --libdir=/usr/local/lib -i ptcp: routing', 
+         cdir='/usr/local/bin', **kwargs)
+   
+if __name__ == '__main__':
+   init()   
+   network = GridNet( 2, 2, kernel=True, Controller=NoxController)
+   network.run( Cli )