Draft: Control-volume finite-element discretization
What this MR does / why does DuMux need it:
- Implements a new discretization scheme (box + cell unknown)
- Implements a 1p porous medium test
- Tests the discretization
** ToDo
-
Cleanup geometryhelper, maybe use tuple -
Implement MultithreadedAssembly -
Implement Parallelization
Edited by Martin Schneider