RBAC framework initially incorporated by RBAC Model, Roles View & new method in Admin Controller (verify_access).
Test, Optimization, Review of Rights & rewrite of existing authorization methods to be done.

Draft client-app to support Admin Panel based on appclient.
Side Navigation updated to recognize basic Roles. (to be rewriten)

PHPDoc tags and minor documentation for each method in Admin Controller.
Todo tasks indicated by @todo tag.