[bugfix]

[bugfix]

[to be dropped] added a test using some dune-fem bindings to test different aspects of the VtkWriter bindings

use 'pointData' instead of 'pointVector' as argument for vtkWriter since
that argument can also be used for tensors.

[python] remove dune packages from 'install_requires' in setup.py.in

add metadata to dune.module for pip packaging

add cellData method and add missing parameter to constructor of write

remove test requiring dune-fem (moved to dune-fem)

fix cut and paste error in dune.module file