preconditioner, i.e. set new linearization point.

exported and used on Python side for RungeKutta solvers such that these
can be used in parallel.

replace assertHave with assertCMakeHave which has to be used slightly differently with the new dune-py setup process

adapt ci yml file to python bindings on by default

pep 42: use implicit namespace packages which make it possible to combine subpackages using editable (source) and non editable (pypi)

simplified ci based on new python binding setup in dune-common

check if mpi4py is needed to fix CI

add a stopgap solution unti ci repo up and running again

only add dune modules that have been found as requirements in setup.py.in

removed setup.py.in since the default is provided in dune-common

tutorial.

add a 'default' for the threading parameter in the dg operator which turns threading on if 'dune.fem.threading.use>1' and leaves threading off otherwise

diffusiveFlux computation.

in dune-fem.

function. This now works after mem leak in discrete function has been
fixed.

  consequently use operators *= etc on discrete function.

efficiency comparisons.

unnecessary recompilation.

module.

to not be available.

paraview.

provided.

empty for simplex grids.

more reasonable.

it is also used for normal limiter