[system.assembler] allow passing custom Partitioning to assemble()
[elliptic-sipdg-discretization] readd current_grid_width()
- without it, compiler complains about pure virtual function
[elliptic-sipdg-discretization] readd current_grid_width()
- without it, compiler complains about pure virtual function
[test.products_boundaryl2/elliptic] fix unsafe conversion warning
[test.products_boundaryl2/elliptic] fix unsafe conversion warning
[test.elliptic-s(w)ipdg-discretization] drop dune-fem dependency
-instead of using Fem::GridWidth::calcGridWidth do calculation locally
[test.elliptic-s(w)ipdg-discretization] calculate grid_width from one entity only
[test.elliptic-s(w)ipdg-discretization] use entity_diameter to calculate grid width
[test.elliptic-s(w)ipdg-discretization] use gridinfo from stuff, refs #31