Minor changes
- changed logger default to Warning
- add mode option to set_pore/throat_info
- started adding a is_label method (not ready yet)
Merge branch 'feature/MajorReno' of https://github.com/PMEAL/OpenPNM into feature/MajorReno

Conflicts:
	OpenPNM/Network/__Delaunay__.py
Fixed error in is_labels