Now OGL doesn't rely on WX for PNG saving.
FlipImageData supports (pixel data len > 3) now.
TextureToPng is now in ImageWrite.cpp/h
Video Common depends on zlib and png.
D3D no longer depends on zlib and png.
DSPHLE: Some warning fixes and added some logging for unknown voice cases
Please report if anything has broken.
git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@3884 8ced0084-cf51-0410-be5f-012b33b47a6e