Search Implement for Image,Files

Important changes:

new file created:
1)file_search.html 
     This file will display search result for Image and files
modified file:
1)/views/file.py
     file_search function added to fetch serached data
2)/views/ImageDashboard.py
     image_search function added to fetched searched data for Images only
3)templatetags/ndf_tags
      get_user_objects function added to fetch user object 
     just provide id to fetch user object 
     please use same function if u want user object from sqllite table