An example for "upscaling of two-phase flow properties using pore network"

Since many people use pore network for upscaling purposes, there is a need to have a well-designed and documented example of how it can be done using the pore network in DUMUX. Although we already have an example for upscaling of a single-phase flow system, having another example for upscaling of a two-phase system to obtain capillary-saturation and relative permeability-saturation curves is desirable.