version 1.3.4

Changelog:
- CUDA: better quality and performance, Fix wrong display order. No
Mosaics.
- vaapi and dxva support SSE4.1 to copy decoded frame for intel gpu.
vaapi was added months ago, but the performance was very poor. With the
help of SSE4.1 we have greate performance improvement.
- VAAPI supports drm
- Use latest FFmpeg's hw api
- Fix wrong display or crash if change HW decoder
- Add some options for AVCodec and AVFormat as decoder's meta
properties.
- Metadata support
- Display aspect ratio use the value in stream if defined. Thank Sandro
Cavazzoni
- Support install QtAV as a Qt module
- Fix wrong file name encoding.
- Display the image in a music file