removed start_tm
added start_date (PT::Date)
changed: in Session:
removed: tm_time
added: start_date (PT::Date)
renamed: time -> start_time
the same is for last_time
now we have (last_time and last_date)
git-svn-id: svn://ttmath.org/publicrep/winix/trunk@838 e52654a7-88a9-db11-a3e9-0013d4bc506e