- cleanup of legacy stuff in slot management. * merged InfoSlot and InterceptorSlot into RelationSlot * get rid of legacy "mixin set ...." command - renamed "parameterSlot" into "methodParameterSlot" to avoid potential confusions
- name parameterType -> parameterSlot - use for now same parameterSlot for xotcl1 + 2 - disallow unknown types (otherwise interpreted as user-types) in valuecheck