per edge and vertex.

improved the runtime configuration check for the python package

See merge request !36

CMakeLists.txt file

make it possible to not pass dimgrid to grid constructor.

See merge request !34

fix an issue with python_install in case pip was not found

See merge request !35

provided by users an attempt is made to extract the dimension from
constructor arguments given if possible

Remove dynamic exception specifications

See merge request !33

Dynamic exception specifications have been deprecated since C++11 and removed
in C++17, and with those still in dune-alugrid fails to compile on GCC 7 and
Clang 5 in C++17 mode.

This patch just straight up removes them.

consecutive boundarySegmentIndex.

- reverts previous implementation of boundarySegmentIndex to the old
segmentId
- introduce a boundary segment index set that provides a consecutive
index set for macro boundary segements.

Add a test for backup/restore

See merge request !30