Merge branch 'demo_fixes' into 'NIFTy_5'

Python compatibility

See merge request !286
11 jobs for NIFTy_5 in 18 minutes and 37 seconds (queued for 1 second)
Status Job ID Name Coverage
  Build Docker
passed #726355
build_docker_from_scratch

00:09:49

 
  Test
passed #726357
test_mpi

00:04:11

passed #726356
test_serial

00:04:49

83.0%
 
  Release
passed #726358
pages

00:00:48

 
  Demo Runs
passed #726363
run_bernoulli

00:00:34

passed #726364
run_curve_fitting

00:00:32

passed #726360
run_getting_started_1

00:00:32

passed #726361
run_getting_started_2

00:01:22

passed #726362
run_getting_started_3

00:03:09

passed #726359
run_ipynb

00:01:30

 
  Deploy
passed pages:deploy

00:00:01