changed: DirContainer - uses std::list instead of std::vector as the main container

we do not have to rebuild indexes after deleting some items
added:   DirContainer::DelById(long id)
changed: Dirs::CheckRootDir() addes the root dir if there is no one
added:   Dirs::DeleteDir(long id) - deletes specified directory (and its contents)
         (from the cache and the database)
added:   Db::DelDirById(long id) - deletes a dir from the database 
         and its first children
added:   standard function rm can delete directories


git-svn-id: svn://ttmath.org/publicrep/cmslu/trunk@487 e52654a7-88a9-db11-a3e9-0013d4bc506e

templates/done.cpp

@@ -79,6 +79,11 @@ void done_added_dir(Info & i)
 }
 
 
+void done_deleted_dir(Info & i)
+{
+	i.result = request.session->done == Done::deleted_dir;
+}
+
 
 
 void done_defaulted_dir(Info & i)