consequently use operators *= etc on discrete function.

conflict.

Feature/python timings

See merge request !31

efficiency comparisons.

Bugfix threading and higher order FV.

See merge request !30

testing.

Fix threading with python.

See merge request !29

seems to be fixed in dune-fem.

sure it is called before the parallel threads are started.
Also, parameters cannot be accessed inside thread parallel regions
otherwise a dead lock occurs.

implementation and only use the one from LocalPass.

unnecessary recompilation.

module.