Added option to return json when API request successed.
Added option to return json when API request successed.

Some platform, like Weibo, Twitter, need mediaIDs to post multi-photos.

nixzhu/MonkeyKing,nixzhu/MonkeyKing,fyl00/MonkeyKing,fyl00/MonkeyKing,nixzhu/MonkeyKing,fyl00/MonkeyKing,nixzhu/MonkeyKing,fyl00/MonkeyKing