Merge branch 'fhennig/vector-kernels' into 'v2.0-dev'

src/pystencils/backend/ast/expressions.py

src/pystencils/backend/kernelcreation/__init__.py

src/pystencils/backend/kernelcreation/cpu_optimization.py

src/pystencils/backend/kernelcreation/iteration_space.py

src/pystencils/backend/platforms/x86.py

src/pystencils/backend/transformations/loop_vectorizer.py

src/pystencils/backend/transformations/lower_to_c.py

src/pystencils/config.py

src/pystencils/kernelcreation.py

src/pystencils/target.py

src/pystencils/types/meta.py

tests/kernelcreation/test_domain_kernels.py

tests/kernelcreation/test_sliced_iteration.py

tests/nbackend/test_vectorization.py

tests/nbackend/transformations/test_lower_to_c.py

tests/test_quicktests.py