refs #3 allow to download without login
refs #3 allow to download without login

wangjun/open-slideshare,jaambee/open-slideshare,ryuzee/open-slideshare,wangjun/open-slideshare,ryuzee/open-slideshare,jaambee/open-slideshare,wangjun/open-slideshare,ryuzee/open-slideshare,jaambee/open-slideshare