Mongokit

1) modified image and file url to acces file with there name and extension as suggested by amit and GN sir
2) by having this feature we can easily embed files and images in the org mode editor 
changes file
1) image_detail.html
2) urls/image.py
3) urls/file.py
4) views/file.py
5) views/imagedashboard.py
6) video_detail.html