When not using dunecontrol but pure cmake, an installed dune-grid was
preferred. In my case I was testing master and had 2.6 installed. The
latter was found when running cmake directly.

This change fixes this by introducing the same trickery as for
dune-common. Please note that this is not needed for modules that
adhere to the usual workflow (without an explicit search for
dependencies and relying on DuneMacros). But here a different approach
was used and that probably has its reasons.

in WIP status.

Merge branch 'feature/addPythonBindings' into 'master'

See merge request [!88]

  [!88]: Noneextensions/dune-alugrid/merge_requests/88

other tests are not being run

Python bindings, default is OFF.

Merge branch 'bugfix/visibility' into 'master'

See merge request [!87]

  [!87]: Noneextensions/dune-alugrid/merge_requests/87

Merge branch 'bugfix/ci-runtimes' into 'master'

See merge request [!85]

  [!85]: Noneextensions/dune-alugrid/merge_requests/85

Alberta.

Merge branch 'bugfix/fixedsize-fixedSize' into 'master'

See merge request [!86]

  [!86]: Noneextensions/dune-alugrid/merge_requests/86

getRealIntersection.

(see issue #57)