Fixed issue with not showing SLA

-- autoassign customer contacts of SLA to ticket based on parameter AutoAssignCustomerMembersOfSLAToTicket

  Added a dynamic report that shows the number of closed tickets per day
  for the last 30 days

-- fixed bug related to auto-assignment of employees to ticket when they are member of the SLA project

   Default value used to be "queue" which did not show any tickets when customer
   was accessing the system

   Otherwise he's allowed to edit all forum threads

-- removed biz_object_rel from ticket to customer if customer created ticket
   otherwise customer is able to edit all forum threads in the ticket

   No if only one sla exists, it becomes the default sla
   THis covers most customer interactions w/ the helpdesk
   ToDo: Check behaviour: Clcick on link "Create new ticket" with no SLA selected

  Customer contacts can now "see" all tickets of their company

  Fixed ticket_sla_id in "New Ticket", so that
  new tickets will end up in the same SLA as the
  one just observed

  Creating new tickets now in same SLA as selected

  Exported English

  Fixed English and German translation

  Exported strings from SL

  Now setting the SLA of the new_ticket ad_form
  by default to the selected SLA

  Fixed notification

  Fixed ticket notification

  Notification

  Updated action message template

  Removed duplicate callback

  Fixed l10n

  New parameters in order to determine how SLA names should be formatted

  Modified the way the SLA name is shown

  Fixed l10n

  Fixed SLA portlet showing tickets

  Added portlet to SLAs that shows the list of included tickets