add pkg version number to log header
add pkg version number to log header

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