Bug fixes and MIS template updates


**Functionalities implemented:**

**1) Bug resolved - User-groups were inaccessible via group's dropdown list.**

   - File modified:
   
     1) templatetags/ndf_tags.py
     
        - get_group_type() updated: Query modified [Author added to _type]
        
**2) Updated date widget for DOB field.**

   - Now month and year can be changed.

   - File modified:
   
     1) templates/ndf/person_create_edit.html
     
**3) Blocktrans tag's bug resolved & mandatory mark (star) shifted to end of html-element.**

   - File modified:
   
     1) templates/ndf/html_field_widget.html

**4) CSS styles added for jquery's date widget & foundation's error class.**

   - File modified:
   
     1) templates/ndf/mis_base_create_edit.html