Announce this:

Announce this:
  <li><p>New: There is now a class TriaAccessor<0,1,spacedim> that allows
  to write things like
  @code
    cell->face(0)->boundary_indicator();
    cell->face(1)->at_boundary();
  @endcode
  even if the cell corresponds to a one-dimensional triangulation where
  this was not previously possible.
  <br>
  (WB, 2010/11/11)
  </p></li>

git-svn-id: https://svn.dealii.org/trunk@22701 0785d39b-7218-0410-832d-ea1e28bc413d