Merge branch 'master' into next

src/libqhull_r/geom_r.h

src/libqhull_r/io_r.h

src/libqhull_r/libqhull_r.h

src/libqhull_r/mem_r.h

src/libqhull_r/merge_r.h

src/libqhull_r/poly_r.h

src/libqhull_r/qhull_ra.h

src/libqhull_r/qset_r.h

src/libqhull_r/random_r.h

src/libqhull_r/stat_r.h

src/libqhullcpp/Coordinates.h

src/libqhullcpp/PointCoordinates.h

src/libqhullcpp/QhullFacet.h

src/libqhullcpp/QhullHyperplane.h

src/libqhullcpp/QhullIterator.h

src/libqhullcpp/QhullLinkedList.h

src/libqhullcpp/QhullPoint.h

src/libqhullcpp/QhullPointSet.h

src/libqhullcpp/QhullPoints.h

src/libqhullcpp/QhullQh.h