- Feature #23: Complete the list of geometric elements shipped with HappyHeart. - Support #15: Adjust the code so that 'Vertex' and 'Coords' are correctly used throughout the code. - Support #15: Storage of Reference Interface has been completely modified to improve readability of the code. - Support #15: The Node object now gets a pointer to the related interface, and therefore to the potential Coords object. - Support #28: The code is now working also for a P2 mesh.