Make uninames a proper multi method
Make uninames a proper multi method

- move the main logic to the Str class
- make the sub version just pass on to the appropriate method
- makes uninames about 2x as fast

rakudo/rakudo,labster/rakudo,tbrowder/rakudo,tbrowder/rakudo,MasterDuke17/rakudo,labster/rakudo,tbrowder/rakudo,salortiz/rakudo,tony-o/rakudo,rakudo/rakudo,tbrowder/rakudo,rakudo/rakudo,MasterDuke17/rakudo,salortiz/rakudo,MasterDuke17/rakudo,rakudo/rakudo,MasterDuke17/rakudo,labster/rakudo,tbrowder/rakudo,rakudo/rakudo,labster/rakudo,MasterDuke17/rakudo,MasterDuke17/rakudo,tony-o/rakudo,tony-o/rakudo,tony-o/rakudo,tony-o/rakudo,rakudo/rakudo,labster/rakudo,salortiz/rakudo,tbrowder/rakudo,salortiz/rakudo,salortiz/rakudo,tony-o/rakudo,salortiz/rakudo,labster/rakudo