Support of mask
Support of ::undef blessing, Support of mask, :start accepts only a symbol, assign actions option to recognizer namespace, Restrict pre and post to lexactions option, do not apply default action nor default blessing for internal representation of ||, added notion of synonyms and exceptions for merge_hints, new routine check_g1rules, say our grammar in "_internal_", fix bug with blessing for generation actions at recognize time, replaced a die with a croak