change from u'string' to 'string' format in examples
change from u'string' to 'string' format in examples

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