Dataset folder permissions (#189, #165)

Author: trinath503

backend/database/datasets.py

@@ -32,6 +32,8 @@ def save(self, *args, **kwargs):
 
         if not os.path.exists(directory):
             os.makedirs(directory)
+            #changing permission of folder to upload images with out sudo permissions (anyone can upload images)
+            os.chmod(directory,0o777)
 
         self.directory = directory