Minor improvements.
Refactored and improved data security mechanisms.
Implemented dynamic assignment of the "owner" and "sharedWith" roles.
Added test for role-based security checks.
Introduced generic User interface.
Minot improvement of HTML "a" tag factory util.
Added new annotations in the common utils.
Added field retrieveal utils in Cls.
Introduced metadata (annotation) retrieval utils.
Added simple user entity model in App module for convenience.
Refactored security components and introduced data access security.