Merge branch 'develop' into 'master'

doc/notebooks/01_tutorial_getting_started.ipynb

doc/notebooks/04_tutorial_advection_diffusion.ipynb

pystencils/backends/dot.py

pystencils/cpu/kernelcreation.py

pystencils/datahandling/parallel_datahandling.py

pystencils/fd/spatial.py

pystencils/field.py

pystencils/kerncraft_coupling/kerncraft_interface.py

pystencils/stencil.py

pystencils/transformations.py

pystencils_tests/test_address_of.py

pystencils_tests/test_aligned_array.py

pystencils_tests/test_basic_usage_llvm.ipynb

pystencils_tests/test_blocking.py

pystencils_tests/test_boundary.py

pystencils_tests/test_cudagpu.py

...s_tests/test_data/datahandling_parallel_load_test/dst.dat

...s_tests/test_data/datahandling_parallel_load_test/src.dat

...s_tests/test_data/datahandling_parallel_save_test/dst.dat

...s_tests/test_data/datahandling_parallel_save_test/src.dat