public activity 858

fixes #858 problem of user no longer existing
Also shows unfiltered activity for users that are admin. Increases activities that are tracked-- it's not latest activity if it isn't inclusive. If memory serves me correctly, Brian already has a scheduled task that trims this down. Also shows pertinent information regarding items that have been deleted (if it can, otherwise it shows the 'which has since been removed')-- this is important for auditing.