A couple updates

- Use transitions time variable instead of direct time values.
- Add `deep-content` effect on modals
- Add `top-bounce-out` and `bottom-bounce-out` effects on off page nav.
- Change `effeckt-hide-class` to `effeckt-needs-hide-class`
- Change `effeckt-x-show` and `effeckt-x-hide` to `effeckt-show` and `effeckt-hide`