Merge branch 'master' into example-fixes

.gitlab-ci.yml

doc/misc.rst

doc/ref_creation.rst

doc/tutorial.rst

examples/python/hello-loopy.py

examples/python/vector-types.cl

examples/python/vector-types.py

loopy/__init__.py

loopy/check.py

loopy/diagnostic.py

loopy/frontend/fortran/translator.py

loopy/kernel/creation.py

loopy/kernel/instruction.py

loopy/kernel/tools.py

loopy/options.py

loopy/preprocess.py

loopy/schedule/__init__.py

loopy/symbolic.py

loopy/target/c/__init__.py

loopy/target/c/c_execution.py