static files that come with the latest django-helpdesk work.

…o diffs-to-upstream

Conflicts:
	README.rst
	helpdesk/templates/helpdesk/report_output.html

in order to use the AdminDateWidget, AdminTimeWidget and AdminSplitDateTime
we'll have to change the templates - let's do this later.

- look at settings.py for all new options regarding customization.
- settings can be accessed inside the templates via the new
  templatetag 'load_helpdesk_settings'

- allow editing of personal followups, but only if followup does not
  contain any ticketchanges - otherwise this information is lost after
  the editing.
- add 'delete' link to attachments
- link to list of closed tickets in queue overview
- add 'closed & resolved' section to dashboard
- hide 'pre-set reply' box if no pre-set replies are found.

- fix how we update followups so that attachments don't get deleted
- fix bug where resolution emails contained the solution 'None'
- fix stats crashing bug