fixed gumhos typo in camel case util method
fixed gumhos typo in camel case util method

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