Update __init__.py

New Stuff:

- Auto Add django-debug-toolbar: try to import it, if sucessful and is not on settings and the database exist(debug_toolbar needs a DB) and DEBUG=True, then configure debug_toolbar.
- Auto Add SECRET_KEY: If no SECRET_KEY on settings, try to read SECRET_KEY from ./secret.txt , if no ./secret.txt generate a random string then write it to ./secret.txt and finally return it as SECRET_KEY.
- Auto Add django.contrib.humanize
- Auto Add django.contrib.staticfiles
- Auto Import get_list_or_404, render, redirect from django.shortcuts