Script added for theme translations (NROER)

theme_translations.py script added for hindi translation of theme hierarchy.
steps to follow:
1. python manage.py filldb

2. pip install xlrd

3. Make sure that all english theme hierarchy exists. i.e 
If following script already executed the do not follows Instructions (A) :
python manage.py themes_entry ncf_themes.csv  

      Instructuctions (A):
       a) create folder in management as "schema_files" and put this ncf_themes.csv into it.
         then run command as:
       b) python manage.py themes_entry ncf_themes.csv

4. copy attached file into /management/schema_files directory

5. run  python manage.py theme_translations