- added parameter option slot= to pass slotobj to a certain parameter - use slot option to keep relation between parameter and slot - object parameter dispatch type checker on slot objects - allow transformation via user-defined converter (can be use to standardize parameter values) experimental implementation, refcounting has to be looked in detail, maybe we need a different interface for the converters
- predefined.xotcl: move toParameterSyntax and objectparameter to a position, where basic slot definitions are provided - fixed default value setting in bootstrap code - provide more precise error message in converter, when object type are used - extend regression test