- many issues (esp. crashes) vanish / are easier to fix
- likely you need the 'full' vlc package (with X11 plugins)
- this commit introduces introduces various regressions ;-)
- big picture problems with libvlc:
  - dvd navigation (likely solved with libvlc 1.2 once it's released)
  - VDPAU
- make MediaWidget more state-orientated, i.e. separate between
 - functions, which modify the state (e.g. a signal from the backend)
 - functions, which rely on the state (e.g. ui updates)