test on RoleManager.
checks if $entity is an object or not. also changed error message (not using get_class).
added Role\Rm_BasicTest to the suites.
initial implementation of DataIO Role.
return default rule/selector if the property is not defined.
added protect method.
added a comment.
added html form element related methods.
specifies what is returned as selector.
added test that entity and retrieved ones are same/identical.