Blending is now done onto a separate surface, leaving GFX.Screen
intact for avi recording. This also makes it possible to preview
the effect in the video settings.
New option in emulation settings allows forcing the recording size
to 512x448, otherwise always resize output to 256x239.
Also improves avi sound sync (gocha)
drag&drop support for ROMs (no movies atm)
unified avi recording menu item
removed a few legacy leftovers
disabling the strech option no longer disables bilinear filtering
OpengGL support
full unicode support
x64 build support
shader support (D3D+OGL)
DDraw: vsync, dynamic buffer allocation
restored SPC save option
better window position saving
fixed crash during fullscreen switch