Kernel::Compare_lexicographically_d

A model for this must provide:

Comparison_result fo ( Kernel::Point_d p , Kernel::Point_d q )
Compares the Cartesian coordinates of points p and q lexicographically in ascending order of its Cartesian components p[i] and q[i] for i = 0,...,d-1.
Precondition: The objects are of the same dimension.