moved OS-class one level up for better theming flexibility

cfoe

2012-07-13 5ed2f06bdc10389c0d8a5f2da386b7b7ba98ff9e

1
ALTER TABLE  `sys_session` CHANGE  `session_id`  `session_id` VARCHAR( 64 ) CHARACTER SET latin1 COLLATE latin1_swedish_ci NOT NULL;