* mln/core/concept/image.hh (mln::Image<E>::Image): Add concept
	checks for typedef piter.
	Update documentation.
	Aesthetic changes.
	* mln/core/alias/point2d.hh (mln::point2d, mln::point2df)
	* mln/core/alias/dpoint2d.hh (mln::dpoint2d)
	* mln/core/image/image2d.hh (mln::image2d<T>::at_)
	* mln/core/window.hh (mln::window<D>::dps_hook_):
	Use fully qualified type names.

git-svn-id: https://svn.lrde.epita.fr/svn/oln/trunk@3820 4aad255d-cdde-0310-9447-f3009e2ae8c0