Kernel::Linearly_independent_d

A model for this must provide:

template <class ForwardIterator>
bool fo ( ForwardIterator first, ForwardIterator last)
decides whether the vectors in A = tuple [first,last) are linearly independent.
Precondition: The objects in A are of the same dimension.
Requirement: The value type of ForwardIterator is Kernel_d::Vector_d.