warn if pydot version < 1.0.28 found by setup.py
warn if pydot version < 1.0.28 found by setup.py

necozay/tulip-control,necozay/tulip-control,necozay/tulip-control,tulip-control/tulip-control,tulip-control/tulip-control,necozay/tulip-control,tulip-control/tulip-control,tulip-control/tulip-control,necozay/tulip-control