Log Message:
Changes 0.80:
* deletion of unattached GDL added.
* Polish translation update by Emil.
* fix UADDR list redisplay problem.
* fix a crash of dc_gui2_stat when there is nothing to display.
* add upload stat to dc_gui2_stat (only DCTC v0.85.9 provides upload logs).
* fix a user display problem. If a user entering the hub is already created
  (used by GDL, upload, share list, ...), he was not displayed in the user
  clist.
* Fix incorrect global stat values occuring when multiple 'done' files are
  loaded.
* Bittorrent tab is handled by an external program: dc_gui2_bt
* To ease development of future external program, most of the configuration is
* now store in gconf instead gnome_config.
* dc_gui2 command line parameters are back (dc_gui2 --help for the list).
* update .spec file to support fedora (based on Sammy Atmadja modification).