- Removed the last_login field from the User model, inserted it to the Registry model (a User instance retains now one last_login value for each Platform instance that is associated with it via the corresponding Registry instance) and modified the emission arguments of the user_logged_in signal for logged-in User instances
- Constrained the email fields of the User/Admin models and user profile edit/recovery forms to a maximum length of 100 characters
- Constrained the username and password fields of the login form to a minimum length of 8 characters
- Omitted the redundant ECE-NTUA platform from the test Platform instances that are used to populate the usermerge_platform table of usermergeDB
- Omitted the username format check {piYYbSSS with SSS <> 000} of the login form for the Novice and Grader platforms as there can exist valid usernames for them that are not in the aforementioned format
- Enabled the Django admin site, registered all the application models to it and provided instructions on accessing it
- Defined the User_login_required() and Admin_login_required() decorators and used them for enhanced access control in the majority of views
- Reduced the database queries made in recover_user_profile() view to enhance its performance
- Added the production_logs folder to the .gitignore file

- 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

- Loaded the time zone tables in mysql database
- Added Unicode/UTF-8 data support in usermergeDB and templates
- Replaced CLASS_SESSION_KEY with PLATFORM_SESSION_KEY in the session data as the latter indicates both user model and platform
- Corrected the session auth hash calculation method of both user models to take password (and platform, in case of User model) into account
- Enhanced template structure and functionality by using XHTML5 syntax, new HTML5 semantic elements, html5shiv.js, normalize.css, field labels, appropriate images/icons, etc. and moving internal CSS to base.css
- Made some minor changes in models (changed max_length of first_name and last_name fields) and database connection options (introduced SET_DEFAULT_STORAGE_ENGINE_TO_INNODB variable and changed SQL mode)

- 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