For the MangaGamer version of Sengoku Rance. This makes libwebp a
dependency.
These webp files have a non-standard metadata block appended to them
which specifies the base CG that should be used for unfilled pixels,
where "unfilled" means any pixels with a pure magenta color (255,0,255).
- Create separate directories for source and header files.
- Build code shared between xsystem4 and aindump as a static library.
- Create header dirs gfx/ system4/ and vm/
- Make CG.c/h usable without a running VM
Nunuhara Cabbage