v5.4.0-beta

This release includes:

• a review of the verbosity levels (from -1 to 5, -1 being totally mute for the libraries);
• a new management of the metric gradation along required edges to avoid very bad qualities when the prescribed metric doesn't match with the size of the required entity;
• the robustification of the 3D anisotropic mesh adaptation;
• the prohibition of the creation of spurious sharp angles on anisotropic surfaces;
• a new option (-lag) to perform lagrangian movement (with Dirichlet boundary conditions only) in a mesh.