Feature/darcydarcy
@kweis @DennisGlaeser can you have a look? Some things are not that nice (yet) or TODOs:
- Grid creator doesn't work for same grid + same discretization because of the singleton (I temporarily added a tag) (#431 (closed))
- Doesn't work yet without caching or sol-dependent perms -> it does
- Coupling should be per scvf not element to differentiate between different boundaries of one element
- How to do Dirichlet boundaries -> doesn't make sense for tpfa
This should in theory also be able to couple e.g. 1p and 2p.
- Show in a 1p_2p test
What was nice: the coupling manager (although not very efficient) is very small until now.