Implements approximate and exact decomposition of non-convex meshes into convex parts, which can then be used as a PE-Union.
The approximate decomposition is performed using the V-HACD-Library and the exact decomposition uses the CGAL-Library. This branch implements the interface to walberla and the right transformations from the walberla mesh formats to the formats of the libraries and back.
Update build images to provide CGAl
Update build images to provide vAHCD