Update to 0.20.4:

0.20.4
======

Changes since 0.20.3:
- Fix warnings in gtk-doc run.
- Some minor improvements to the documentation.
- Make the user-agent ASCII-only to fix issues with discovery when
  g_get_application_name () returned a translated string.
- Force HTTP version to be 1.1 in SOAP requests.
- Fix potential crashes in XML parsing.
- Fix potential memory leak in gupnp_service_proxy_send_action_valist.
- Some codestyle fixes.
- Add gupnp_device_info_list_dlna_device_class_identifier () to retrieve the
  content of <dlna:X_DLNADOC> nodes.

Bugs fixed in this release:
- https://bugzilla.gnome.org/show_bug.cgi?id=704953
- https://bugzilla.gnome.org/show_bug.cgi?id=702555
- https://bugzilla.gnome.org/show_bug.cgi?id=704094
- https://bugzilla.gnome.org/show_bug.cgi?id=700947

All contributors to this release:
  Ludovic Ferrandis <ludovic.ferrandis@intel.com>
  Jens Georg <mail@jensge.org>
  S辿bastien Bianti <sebastien.bianti@linux.intel.com>
  Bastien Nocera <hadess@hadess.net>

(wiz)