Feature: Gauss-Radau quadratures

See merge request !154

use SCRIPT instead of COMMAND in dune_python_add_test

See merge request !156

matched the quad order in the maxima scripts to the definitions in quadraturerules.hh, final cleanup, tested everything

refactored the writequad maxima script, it produces (apart from comments) the same files as before for jacobi rules and gauss lobatto rules

Feature/scikit build

See merge request !152

make it possible to use setup.py without having an installed dune-common python package. This requires having the PYTHONPATH set as it is now done in dune-common/bin/dunepackaging.py

Guard against misuse of AxisAlignedCubeGeometry constructor

See merge request !150

The AxisAlignedCubeGeometry has always had a constructor that was always
intended to be used with dim==coorddim only.  However, this precondition
was never checked anywhere, which could lead to strange bugs.
This patch introduces a static_assert that fails at compile time
if the dim==coorddim precondition is not met.

BUG: core/dune-geometry#25

[axisalignedcubegeometry] Remove copy assignment operator

See merge request !149

* operator does the same as the default-generated one
* fixes compiler warning

Fetch default yml files via different project instead of url

See merge request !147

This is a workaround for a bug that showed up after gitlab migration. See issue
infrastructure/issues0#62 for further discussion.

Merge branch 'feature/require-cmake-3.13' into 'master'

See merge request [!145]

  [!145]: Nonecore/dune-geometry/merge_requests/145

Merge branch 'issue/intel_const_constexpr' into 'master'

ref:core/dune-geometry\>

### Summary

Solve an intel-compiler related error, by replacing const by constexpr for
template parameter variables.

See merge request [!142]

  [!142]: gitlab.dune-project.org/core/dune-geometry/merge_requests/142

Merge branch 'bugfix/MissingAppend' into 'master'

See merge request [!141]

  [!141]: Nonecore/dune-geometry/merge_requests/141

Merge branch 'feature/addPythonBindings' into 'master'

See merge request [!140]

  [!140]: Nonecore/dune-geometry/merge_requests/140

Python bindings, default is OFF.