Added copyright notice to header of aut_to_gexf.py.
Added copyright notice to header of aut_to_gexf.py.

pombredanne/nTLP,pombredanne/nTLP,pombredanne/nTLP,tulip-control/tulip-control,tulip-control/tulip-control,necozay/tulip-control,necozay/tulip-control,necozay/tulip-control,necozay/tulip-control,tulip-control/tulip-control,necozay/tulip-control,tulip-control/tulip-control