Added copy and swap functions to the iterators
Added copy and swap functions to the iterators

matthieuriolo/c-generic-library,gautamdivgi/c-generic-library,Nejij/c-generic-library,gautamdivgi/c-generic-library,Nejij/c-generic-library,matthieuriolo/c-generic-library,gautamdivgi/c-generic-library,matthieuriolo/c-generic-library