version 1.1.9

Changelog:
- Add network interrupt callback. Thanks Vito vcovito
- QtAV and FFmpeg runtime version check
- Add factory model to manager the components. Currently used in
ImageConverter
- MSVC support
- Seek bug fix: some times blocked
- qmake: no additional arguments required(if source dir is writable)
- Add 2 graphics item renderer examples
- GDI+ renderer support
- Start to use script to create new classes