Updated Serbian translation
Port to the new GESContainer API
effects: Use creators, and let GES add TrackElements to tracks
GES is now responsible for removing GESTrackElement from tracks

  + Use the GESTrackElement.get_track_type() method where appropriate
There is no notion of GESTrackElement locking state anymore
pipeline: Make use of the video_overlay directly
Add a button to toggle a "gapless" (auto-ripple) timeline mode

Fixes bug #668056
New X-Large (256x256) logo icon
Flip notches around in the low-resolution icons to match the new 256x256 icon
Register mimetypes for the new xges project format
Ensure PiTiVi can open project files with newer versions of GNOME

The %f or %u argument was not required in desktop files before, it is now.