Merge branch 'master' into cffi

.gitlab-ci.yml

contrib/fortran-to-opencl/setup.cfg

contrib/fortran-to-opencl/translate.py

doc/misc.rst

doc/tools.rst

pyopencl/algorithm.py

pyopencl/array.py

pyopencl/characterize/__init__.py

pyopencl/cl/pyopencl-bessel-j-complex.cl

pyopencl/cl/pyopencl-complex.h

pyopencl/cl/pyopencl-hankel-complex.cl

pyopencl/clmath.py

pyopencl/compyte

pyopencl/elementwise.py

pyopencl/reduction.py

pyopencl/scan.py

pyopencl/version.py

test/test_clmath.py

test/test_wrapper.py