add travis config
add travis config


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