Version 2.12.1

Changes since 2.12.0

* Improve architecture independence
  -- bug #316200 (Stanislav Brabec)
* Fix permissions of some installed png files to not be executable
  -- bug #316173 (Stanislav Brabec)
* Fix installation of media and emoticons to use gnome instead of hicolor
  -- http://bugzilla.novell.com/show_bug.cgi?id=91387 (Rodney Dawes)
* Change the volume-knob icon in all sizes, and replace 48x48 with svg
  -- bug #408160 (Jakub Steiner)
* Updated translations [bg, bn, eu]