[Dune] Returning Geometries As Objects (again)

[Christian Engwer]

Hi Martin,

> Unfortunately, I'm not aware of any algorithm that will ensure the
> recursive bisection will not run into infinite loops in 3d. For some
> grids it helps to select the longest edges are refinement edges.
> Unfortunately, this does not work, if the two longest edges don't
> share a common vertex (as is the case for simplex-testgrid-3.dgf).
> To test this, simply add the block

do you have a simplex file which works at hand? If the test is
expected to fail, we should change the test to use a working grid.

Ciao
Christian