dune_python_configure_bindings.

Replace deprecated CollectiveCommunication by Communication

See merge request !26

Add jacobian()... to SPGrid's geometry implementations

See merge request !27

This avoids the deprecation warning of the default implementation.
The new methods return transposed views storing references
to the (cached) results of `jacobianTransposed()` and
`jacobianInverseTransposed()`.

DUNE_DEPRECATED replaced with [[deprecated]]

See merge request !23

python overhaul

See merge request !22

list of directions.

Merge branch 'feature/addPythonBindings' into 'master'

See merge request [!20]

  [!20]: Noneextensions/dune-spgrid/merge_requests/20

Python bindings, default is OFF.

Merge branch 'issue/array_size_zero' into 'master'

ref:extensions/dune-spgrid\> In generic code it might happen that the
multiindex class is instantiated with dimension zero. This results in a
compiler warning since zero-size c-arrays are not allowed. This MR fixes this
issue, by deactivating the overload in this case.

See merge request [!18]

  [!18]: gitlab.dune-project.org/extensions/dune-spgrid/merge_requests/18