[python] FIx python binding installation

See merge request !100

(cherry picked from commit 35b3c13b)

fcab6722 [python] Remove file extension (this will be added during configure)
fa6e7137 [python] Replace deprecated dune_python_install_package by dune_python_configure_bindings

[capabilities] Encode that to the best of our knowledge we are view...

See merge request !97

[capabilities] Encode that to the best of our knowledge we are view thread-safe (thread-safe between mofifications)

Parametrize the Communication with No_Comm

See merge request !96

[cleanup] Replace deprecated LeafMCMGMapper by regular MCMGMapper

See merge request !95

[cleanup] Use Dune::Communication instead of deprecated Dune::CollectiveCommunication

See merge request !94

Remove deprecated EntityPointer

See merge request !93

The comment even says: 'FoamGridEntityPointer is deprecated and will be removed after release 2.7'

Only enable pythonbindings if DUNE_ENABLE_PYTHONBINDINGS is true

See merge request !92

[cleanup] Remove obsolete assert checking positiveness for an unsigned int

See merge request !91

[python] Use new Python module structure of dune-common MR 960

See merge request !89

Update CI to test against dune 2.8 after rasing requirement

See merge request !90

Fix explicit template instantiation issues

Closes #16

See merge request !88

[entity] Cleanup hierarchic iterator

See merge request !87

[entity] Make entity a non-static interface function as in the dune grid interface

See merge request !86

Remove intermediate type ToUniquePtr in favor of std::unique_ptr

See merge request !85

Introduce GridPtrType as return type for createGrid()

[gridfactory] Fix compiler warning for deprecated insertElement

See merge request !84

* The deprecated interface exists and should be marked override
  at least until release 2.8 including the release.
* After 2.8, i.e. 2.9-git the interface can be removed and is
  also removed here in foamgrid

[cmake] Use file-glob to gather headers to install

See merge request !82

[cmake] Raise required version to 3.13 following upstream modules

See merge request !81

[readme] Update build badge link

See merge request !80