determines the orientation of the points of the tuple
A = tuple [first,last) where consists of points in
-space. This is the sign of the determinant
where A[i] denotes the cartesian coordinate vector of
the -th point in . Precondition: size [first,last) == d+1 and
A[i].dimension() == d . Requirement: The value type of ForwardIterator is
Kernel::Point_d.