README.md
avoid popup menu multiple times. popup in graphicview support

I forgot break so menu will popup again
README and comment for using the factory
C++ use static obj to call functions auto before main
change the way to register a new class in factory
GDI+ renderer for windows

performance is poor!
dptr: const pointer convert
gdi: avoid image auto scale. all painting use gdi

It's different from QPainter
fix no painting when top level changed.
gdi: BitBlt support

BUG: crash after playing for a while
add scripts and templates to generate class

TODO: use idl?
gdi: keep code format the same as template's
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