Porting of a few attributes and methods of Network objects from other places.
Porting of a few attributes and methods of Network objects from other places.

These are particularly useful from the point of view of RMG, and don't hurt
anything when using as a standalone code.

nyee/RMG-Py,KEHANG/RMG-Py,pierrelb/RMG-Py,faribas/RMG-Py,KEHANG/RMG-Py,chatelak/RMG-Py,comocheng/RMG-Py,enochd/RMG-Py,nickvandewiele/RMG-Py,pierrelb/RMG-Py,chatelak/RMG-Py,enochd/RMG-Py,comocheng/RMG-Py,faribas/RMG-Py,nickvandewiele/RMG-Py,nyee/RMG-Py,jwallen/MEASURE