Short Straming pattern demo

doc/conf.py

doc/notebooks/demo_stencils.ipynb

doc/notebooks/demo_streaming_patterns.ipynb

doc/sphinx/tutorials.rst

lbmpy/advanced_streaming/utility.py

lbmpy/fieldaccess.py

lbmpy/maxwellian_equilibrium.py

lbmpy/stencils.py

lbmpy_tests/test_version_string.py

setup.py