/views/: removed debug inline style
/resources/scss/ & /views/back-office/: updated BO layout and style
/controllers/, /resources/ & /views/back-office/: made back-office system (including errors and login) and greatly improved visual aspect
/resources/js/: added a way in front to add alerts from server
/resources/js/: removed a log in back-office app
/controllers/middleware/: added isLoggedIn middleware for BO
/models/: added User model
/tools/oneShot/: added a tool to create a new user