Fixed German translation in logout overlay.
Merge pull request #246 from 4teamwork/pha-i18n-logout

Fixed German translation in logout overlay.
Treeportlet: Implement deferred tree rendering.

When having a large repository-tree with more than 2000 objects,
the three portlet slows down every site reload. To avoid this performance issue
we render the the tree deferred.
Merge pull request #250 from 4teamwork/pg_deferred_treeportlet

Treeportlet: Implement deferred tree rendering.
Added missing french (and german) translations.