Added RelaxedNewton globally to NIFTy.

Fixed descent_direction norming.
Extended wiener_filter_hamiltonian.py <- activated plotting.
4 jobs for newton in 15 minutes and 21 seconds
Status Name Job ID Coverage
  Test
passed test_min #127263

00:07:47

passed test_mpi #127264

00:13:23

passed test_mpi_fftw #127265

00:14:01

passed test_mpi_fftw_hdf5 #127266

00:15:21

27.0%