Fixed compilation of VideoDecoderFFmpegHW
Added cedarx decoder.
Merge remote-tracking branch 'upstream/master'
Panels changed to transparent.
hwa: fix crash after seeking

TODO:
why queue are not empty?
how to skip decoding without fps decrease to much
map point between video output and video frame
player: wheel to zoom

TODO:
touch event
use vo eventfilter
move. override default behavior
VideoFrame create from QImage without deep copy
player: fix build error
vo.dtor not pure virtual
fix export confliction. uniform qmake pro
ffmpeg log use qt's log handler
player: QWheelEvent.angleDelta() is for Qt5
add AVError
qmetatype must be in global namespace
error signals. MUST use QtAV::AVError as parameter explictly for Qt4
qml: emit positionChanged signal
qml: init playing state
add svg for common use write by myself. pack in a lib?
qmlplayer: stylish ui