Added audit hooks after modifying a ticket

-- added sanity check: customer should not be able to delete or nuke ticket

-- for additional reasoning see source code

-- not necessary anymore, see further explanation in code

-- Provide clear identifier when communicate with clients about ticket

  Added a scheduled procedure for the SourceForge Bug-Tracker sweeper

  Added a RSS import script for SourceForge trackers

-- probplem was that customers would get an empty list because default setting was 'My queue'

  Updated to OpenACS 5.7

  Improved default parameter settings

  Fixed on-the fly creation of a new SLA

  Added audit logs to ticket actions

  Users with permissions "view_projects_all" can now log
  tickets on any SLA in the system.

  Removed ticket_queue_id from list of pass-through variables
  in the ticket list page. This fixes a bug sorting the columns
  if ticket_queue_id is used as a DynField

  Fixed audit call to after_create instead of create

  Added a Widget for showing queues

  Added a new object change matrix dashboard widget

  Fixed locking issue

  Reserved another 1000 categories for helpdesk

  Adding a portlet component bay for editing a ticket

  Integrated into helpdesk

  Fixed issues with locking message

  Fixed issue with locking when creating a new ticket

  The im_biz_objects contains the locking information about
  objects once a user presses the "edit" button.

  commands from DynFields

  Updated indexing of tickets