* Implement gtk dialog update.
* Implement advanced config options immediate fetching.
* Fix bug, when fullscreen checkbox is not updated after returning from 
  fullscreen.
* Add SMPEG support.
* I don't know how to update YUV and RGB in one sync frame. Seems, 
  Display_YUV_Overlay waits for video vsync and SDL_Flip does the same - damn.
* ?