Creating PHPDocs for the model classes.
JS bugfix, when the table has no data.
Creating PHPDocs for the controller classes.
Updating some of the views and the bootstrapping
Fixing the exception classes in case the user is not logged in
Updating some smaller things... Like removing unnecessary HTML and updating the customer selector (works now, if no customer data is available). Also updating the README.md and adding a "setup.sql" file.