This adds methods
jacobianInverse(local) and corresponding typedefs
JacobianInverse for the return types to the
Geometry interface. More specifically:
Geometry implementations provided by dune-geometry. All implementations return either a
FieldMatrix or a
DiagonalMatrix by value, even if
jacobianInverseTransposed() provide cached references. Since this only involves transposing the cached matrix, it is still cheap, while not requiring to cache another to matrices.
checkgeometry.hh by the new interface. This requires that all geometry implementations adopt the new interface as well.
checkgeometry.hh this implicitly extends the requirements for the grid geometries. But a default implementation is provided there by dune-grid!577 (merged). Hence the latter should be merged before the present MR.