revise PicasaRetriever to use picasa "alt=json" option
revise PicasaRetriever to use picasa "alt=json" option

modolabs/Kurogo-Mobile-Web,wesley1001/Kurogo-Mobile-Web,wesley1001/Kurogo-Mobile-Web,modolabs/Kurogo-Mobile-Web,wesley1001/Kurogo-Mobile-Web,modolabs/Kurogo-Mobile-Web