Rust bindings to libmupen64plus shared library.
`libmupen64plus.(so|dll|dylib)` must be available in the system lib dirs. You can get it for your OS from [GitHub releases](https://github.com/mupen64plus/mupen64plus-core/releases) or build mupen64plus-core from source (`make -C mupen64plus-core/projects/unix/Makefile all`).