Removed filter_indices and extended the functionality of  has_labels instead - has_labels now returns a boolean mask or list of indices
Removed filter_indices and extended the functionality of  has_labels instead
- has_labels now returns a boolean mask or list of indices


Former-commit-id: 8b9da653c7735fff2c89e5b0f8a13e1881750c8c
Former-commit-id: 6d7d533a9255461257a81ada921b7ef7f853766a
PMEAL/OpenPNM,amdouglas/OpenPNM,amdouglas/OpenPNM,TomTranter/OpenPNM,stadelmanma/OpenPNM