Django (Python Web Framework) Added

Django is a high-level Python Web framework that encourages rapid development and clean, pragmatic design.

Hi there, I just added proper rules to gitignore required for Django, the references are:

Website - https://www.djangoproject.com/
Documentation - https://docs.djangoproject.com
Github Repository - https://github.com/django/django

This gitignore for django is used in the most famous Django Book **Two Scoops of Django** -
https://github.com/twoscoops/django-twoscoops-project