Corrects `normalize`, `maximum` and `to`

The implementation of `normalize` is mixed up with that of `to`, which needs to be seperated. The maximum is wrongly implemented and doesn't respect the several cases. The option `navRewind` belongs to the core because it changes the way how `to` behaves and it's often needed even when the `navigation` plugin is not. Fixes #143, #280 and #293. Related to #276.