Enable Authentication

[jbillcliffe]

As a site user/admin user, I only want users to be authorised to perform actions

• Using django-allauth users can be registered and authenticated
• At each template user access will be considered
• On the base.html template login will get enforced.
• No social login

[jbillcliffe]

Completed with adding django-allauth. Next to use the features and format the templates of account processes.