pd.NaTType is removed in pandas 0.20
pd.NaTType is removed in pandas 0.20

In pandas 0.20 there is no longer a "pd.NaTType".  Replaced with "type(pd.NaT)"
ContinuumIO/odo,quantopian/odo,ContinuumIO/odo,blaze/odo,blaze/odo,quantopian/odo