Immediate email signal handler outline.
Resovle circular import by moving import statement
Test and install requirements and installed_apps update.
Signal Handling tests, plus spelling/sematic corrections.
Removed dummy tests.
small doc update.
Added Email.subject field.
Celery email task outline.
Test tasks.get_email_addresses handles subentites.
Entity filtering test and style cleanup.
Send to superentity bugfix and test.
Test unsubscribe works.
Tests for tasks.get_html_message.
Add text_template_path vs html_template_path distinction.
Add text template rendering.
Setup Celery in settings.
Use EmailMultiAlternatives and test.
Installation and Setup instructions.
Test email from field.
flake8