Add svn keyword Id to discretize.py
Add svn keyword Id to discretize.py

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