Merge branch 'demo_with_units' into 'master'

added units to the simple wiener filter demo. To be tested

See merge request !109
5 jobs for master in 11 minutes and 26 seconds (queued for 1 second)
Status Name Job ID Coverage
  Test
passed test_min #164914

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passed test_mpi #164915

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passed test_mpi_fftw #164916

00:03:58

passed test_mpi_fftw_hdf5 #164917

00:05:00

47.0%
 
  Release
passed release_image_master #164918

00:06:26