- Created and used a library of helper functions that refer (mainly) to views
- Created and used a library of validators that refer (mainly) to forms
- Corrected/enhanced the existing views - used TemplateResponse objects instead of calling the render() shortcut function, inserted post-validation error codes in template contexts when needed, etc.
- Deleted the logout template and used redirection to the login template on logout
- Corrected the generic URL format
- Enhanced the documentation of templates and modules

- Created the DB schema/models and added Greek support to the initiated DB
- Created a script to populate DB with test data
- Implemented the authentication, login and logout back-ends (modified built-in auth, backends and middleware modules) as well as the relative front-ends (user home, admin home and logout templates)
- Implemented some basic validation checks and error handling for the login form
- Created custom HTTP error (400, 403, 404, 500) templates
- Added new instructions to README.md