changed: function 'run' is using a template: fun_run.html
there is: [item_run] called from this template
git-svn-id: svn://ttmath.org/publicrep/cmslu/trunk@489 e52654a7-88a9-db11-a3e9-0013d4bc506e
sessions are indexed by id and time (last used time)
changed: old sessions are deleted
parameter: session_max_iddle in the config file
added: function 'who'
git-svn-id: svn://ttmath.org/publicrep/cmslu/trunk@483 e52654a7-88a9-db11-a3e9-0013d4bc506e