Changelog:
- QML support(thanks theoribeiro <[email protected]>). Can replace some of qtmultimedia qml apps, e.g. qmlvideofx
- Fix build for FFmpeg >= 0.9, libav >= 0.8
- Channel can be choosed by user: original, stero, left, right, centre(mono)
- OSD for GL ES2 renderer
- player: statistics viewer, disable screensaver on widows when playing

Signed-off-by: wang-bin <[email protected]>