Bugs resolved in add_policy script & module part in template

Modification in : 

```
ndf_tags.py
node_edit_base.html
page_list.html
add_policy.py 
```
Conflict resolved in module  implementation in template in node_edit_base.html.

Bug fixed regarding Author document related to loggedin user. No need to logout before running project.
Just keep in mind that for creating user group , user must have to login atleast once.