version 1.3.1

Changelog:
- Initial OpenAL support.
- Fix hardware decoding crashes: seeking, packet loss(e.g. bad network)
- Allwinner's CedarX hardware decoding support. Thanks Miroslav Bendik.
- FFmpeg log and error handling. New class: AVError
- AVDictionary support for decoder and demuxer. API:
AVPlayer::setOptionsForXXX()
- Fix crash on app exit
- Fix Hi10bits crash
- Build:
  * fix XXX_EXPORT macro confliction.
  * configurable qmake project etc.
- QMLPlayer: better UI
- player:
  * wheel to zoom in/out.
  * apply decoder without restart.
  * exit on main window close.
  * move EventHandler to player.
- Installer: ubuntu support.
- Screen saver for OSX, X11. Improve windows
Merge remote-tracking branch 'origin/master'