Off screen nav updates

- Add `card-deck` Animation From Top/Bottom. http://codepen.io/soulrider911/pen/bJqkC
- Add `left-bounce`, `left-bounce-out`, `right-bounce` and `right-bounce-out`.
- Update and use `left-reveal` and `right-reveal`.
- Use standard naming convention: `off-screen-nav-[position]-[name]`
- Add couple of methods and properties on `off-screen-nav.js`