add albumMatchedId and pending keys
add albumMatchedId and pending keys

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