dealii/dealii: deal.II version 9.4.0

All download files are mirrored at https://dealii.43-1.org/downloads/ The major changes of this release are: Three new tutorial programs: 81, 82, 85 demonstrating solving a variety of equations and illustrating functionality in deal.II. Advances in simplex- and mixed-mesh support Repartitioning of distributed meshes Advances in matrix-free infrastructure Advances in multigrid infrastructure CutFEM support Experimental integration of the Computational Geometry Algorithms Library (CGAL) Performance improvements in the particle infrastructure Improvements to unstructured communication For more information see The preprint at https://www.dealii.org/deal94-preprint.pdf The list of changes at https://www.dealii.org/developer/doxygen/deal.II/changes_between_9_3_3_and_9_4_0.htm