Taucs, Lapack and Blas supports are no longer tested
Approved by the Release Manager
Tested in CGAL-4.5-Ic-97
Conflicts:
Polyhedron/demo/Polyhedron/CMakeLists.txt
*Add non-sparse matrix class (thus renamimg of the existing one)
*specialisation of the matrix class in Eigen_solver_traits according
whether this is a symmetric or asymmetric matrix
*update use-files of lapack and Taucs to get definitions