As a user, I'd like to have the ability to register and login to the site.

[Jeffrey Haines]

• The ability to go to a login page. With username and password fields, and a button that says 'Login' and a button that says 'Register'.
• The ability to get notified if username or password are incorrect.
• The ability to go to a registration page. With username, email, password, confirm password fields, and a button that says 'Register'.
• The ability to get notified if a username is already taken.
• The ability to get notified if password and confirm password do not match.
• The ability to get notified if email is invalid.
• The ability to get notified if registration was successful.
• The ability to persist user information into a database.

Extras?

• The ability to notify users by email to confirm their account.
• The ability to protect registration with a captcha check.
• The ability to whitelist approved user emails to screen registration.