Implement email notification functionality
Closes #31 (closed)
Changes made:
- Added insert statements to 'Database.py' to insert more sample users into the 'User' table.
- Added a function in 'query.py' to query the database for emails of users who are subscribed to the "Quote of the Day" service.
- Created 'EmailTemplate.py' to generate the body of the email with a given quote and author.
- Created 'EmailNotifier.py' to send the email containing a randomly selected quote to all subscribed users.
Screenshot of sample email: