Added Np and Nt @property methods to GenericGeometry
Added Np and Nt @property methods to GenericGeometry


Former-commit-id: 89a96cfe27bd3aac4203029eb50a9c225bcbd023
Former-commit-id: 783f94fa7a899d1e3bf0f23c9dc80cfe66fbf141
PMEAL/OpenPNM,TomTranter/OpenPNM,amdouglas/OpenPNM,amdouglas/OpenPNM,stadelmanma/OpenPNM