#203116 by smk-ka: Improved performance of non-cached admin_menu by storing already processed URLs in the cache.

Preparing new release.

Fixed display menu item ids in devel settings does not work.

Updated German translation.

Added username to logout button.
Added hook_admin_menu() to allow other modules to alter admin_menu.
#194189 by sun: Added counter for current anonymous/authenticated users.
Added Drupal.org project issue queue links for all enabled contrib modules.
#189701 by sun: Changed admin_menu icon to be a menu.
#193925 by sun: Removed obsolete menu slicing code.