gme WIP
gme_err_t typedef
Use a pointer to the emu object for gme_open_file()
GME wip
GME: expand extensions
gme: add metadata methods
GME: GmeInfoT strings as :string
GME: add support for subsongs
GME: add newline
Don't try to rescue bare LoadError
gme: fix song end detection
gme: implement #format