Merge remote-tracking branch 'origin/NIFTy_7' into nifty627

.gitlab-ci.yml

ChangeLog.md

README.md

demos/bench_gridder.py

demos/bernoulli_demo.py

demos/getting_started_0.ipynb

demos/getting_started_1.py

demos/getting_started_2.py

demos/getting_started_3.py

demos/getting_started_4_CorrelatedFields.ipynb

demos/getting_started_5_mf.py

demos/mgvi_visualized.py

demos/misc/convolution.py

demos/polynomial_fit.py

docs/generate.sh

docs/source/citations.rst

docs/source/code.rst

docs/source/conf.py

docs/source/ift.rst

docs/source/index.rst