Resolving some errors I had while Importing networks.
Accidental push of LocalFiles
Estimation of throat interface volume was pi*(d^3)/6 (sphere volume) when it should be pi*(d^3)/12 (half sphere volume).
Also, hi team!
Some minor changes to get the IP output to show up in the VTK file.
Moved some methods around, should not impact things
- `find_object_by_name` and `save_object_to_csv` are now in Base, rather than Tools
Added 'network' flag to setter and getter

Also some checking have been added to prevent user from writing to the
wrong places!
Merge branch 'develop'
Finally figured out why physics weren't being applied correctly without a geometry.
Merge branch 'feature/James_is_back' into develop
Reversing the change to GenericPhysics
- self._geometry needs to be an empty list that is appended to.
- If the physics are not being attached properly by default then it needs to be fixed somewhere else.
Fixed loglevel in MatFile. Commented out occupancy updates in IP due to errors.
Merge branch 'develop' of https://github.com/PMEAL/OpenPNM into develop
Empty notebook, company commit check
Fixed Physics module for imported networks with no geometry.

It doesn't add 'all' to self._geometry, because self._geometry should be
[ ] in this case. But it adds this label locally.
If the user does not send any geometry to Physics module, it applies to
the entire network. Even if the geometry object has not been created,
the code works as long as the required geometrical data exist.
Small change to set_data
- It now squeezes (N,1) down to (N, )
Generic Geometry now workd properly when sending empty tnums, pnums or both
- when both empty, geometry applies everywhere
- when one or the other is empty, it only applies to the specified places.
Changes to the way that Imported networks are done
- The approach changes the Import class to work with the framework, rather than messing with the framework to work with the class
- The class is not perfect, but is a good outline of how to proceed
- A geometry object is generated while the network is being generated.  The imported geometry data are created using this objects add_method.
Revert "Fixed Physics module for imported networks with no geometry."

This reverts commit 8ec1b507837292ce03d765e4fba158a301f2942a.
Merge branch 'master' into develop

Conflicts:
	OpenPNM/Network/__Import__.py
Started updating examples