updates readme
updates readme

peetahzee/Unofficial-Google-Music-API,simon-weber/Unofficial-Google-Music-API,nvbn/Unofficial-Google-Music-API,tanhaiwang/gmusicapi,jimyx17/gmusic,simon-weber/gmusicapi,dvirtz/gmusicapi,TheOpenDevProject/gmusicapi,dvirtz/gmusicapi,thebigmunch/gmusicapi