Extend unit tests to check uncompressed sparse inputs in sparse solvers
Fix SparseLU regarding uncompressed inputs and avoid manual new/delete calls.
Bug 887: use ei_declare_aligned_stack_constructed_variable instead of manual new[]/delete[] pairs in AMD and Paralellizer
Re-enable products with triangular views of sparse matrices: we simply have to treat them as a sparse matrix.
D&C SVD: add scaling to avoid overflow, fix handling of fixed size matrices