Merge branch 'master' into 'improve_readme'

# Conflicts:
#   README.md
4 jobs for improve_readme in 8 minutes and 44 seconds (queued for 6 minutes and 1 second)
Status Name Job ID Coverage
  Test
passed test_min #165242

00:02:15

passed test_mpi #165243

00:04:12

passed test_mpi_fftw #165244

00:04:17

passed test_mpi_fftw_hdf5 #165245

00:06:44

54.0%